How to Avoid Scams When Selling Items Online

Online marketplaces like Craigslist, Facebook Marketplace, and eBay connect millions of buyers and sellers every day. They also attract scammers who exploit the trust and urgency that characterize these transactions. This guide covers the most common scams targeting sellers, the red flags to watch for, and the single most effective privacy step you can take before listing anything.

The Most Common Marketplace Scams

Overpayment Scam

A "buyer" agrees to your price immediately, then sends a check or payment for more than the asking price. They ask you to refund the difference. The original payment later bounces or is reversed — you're out both the item and the "refund" you sent.

Red flag: Any buyer who overpays without explanation, or who insists on paying by check or money order rather than cash or verified platform payment.

Fake Shipping Scam

The buyer claims they can't meet in person and wants the item shipped. They send a "shipping label" or "payment confirmation" that looks official but is fraudulent. You ship the item; they file a chargeback or the payment never clears.

Red flag: Any buyer who immediately pivots to shipping for a local listing, especially if they ask you to use a specific shipping service or send a prepaid label.

Off-Platform Pivot

The buyer urgently asks to move the conversation to email, WhatsApp, or text before you've established any trust. This removes the protections and reporting tools of the platform.

Red flag: Pressure to move off-platform immediately, often with an excuse like "I don't use this app much" or "it's easier to text."

Identity Phishing

The "buyer" asks for personal details — full name, address, phone number — before agreeing to any transaction. This information gets used for identity theft or targeted scams, not to buy your item.

Red flag: Any buyer who requests personal information beyond what is needed to arrange pickup or payment for the specific item.

Fake Payment Screenshot Scam

The buyer sends a screenshot claiming they've already sent payment via Venmo, Zelle, or a similar app, and asks you to ship or hand over the item before you check your own account. The screenshot is doctored — no money has actually moved. By the time you notice your balance hasn't changed, the buyer and the item are both gone.

Red flag: Any "proof of payment" that arrives as a screenshot or PDF rather than showing up as an actual balance change in your own banking or payment app.

In-Person Bait-and-Switch

The buyer agrees to meet, but arrives with a story: they only have less cash than agreed, or they want to "test" a high-value item before paying in a way that leaves them holding it. This tactic is designed to create a rushed, socially awkward moment where the seller feels pressure to concede rather than walk away.

Red flag: Any last-minute change to the agreed price, payment method, or handoff process once you're already at the meeting location.

Which Platforms Carry the Most Risk

Not all marketplaces have the same risk profile. Craigslist has no buyer or seller verification at all, which makes it the platform most associated with the scams above — anyone can message a listing with zero accountability. Facebook Marketplace ties listings to a real Facebook profile, which filters out some bad actors but not all, since fake or freshly-created profiles are common. eBay sits at the other end: built-in buyer/seller ratings, purchase protection, and payment processing through the platform itself catch most scam patterns before they reach the seller directly. As a rule, the less identity verification a platform requires, the more seller-side vigilance is needed — which is exactly where Craigslist and unmoderated local-sale groups demand the most caution.

Red Flags That Signal a Scam

• Immediate, unconditional offer at or above asking price
• Unusual payment methods: checks, money orders, gift cards, wire transfers, or cryptocurrency for a casual transaction
• Pressure to decide quickly or "other buyers are waiting"
• Requests to send a refund before the original payment clears
• Messages with poor grammar and unusual phrasing (common in bulk scam templates)
• Buyer doesn't ask any questions about the item — they just want to buy
• Requests to ship to an unusual address or use a specific shipping service

Protecting Your Personal Phone Number

Beyond scam tactics, the most persistent risk marketplace sellers face is simply giving their personal phone number to too many strangers. Once you've shared your number with a buyer, you cannot take it back. It gets saved in their contacts, potentially shared with others, and used as a vector for spam calls and texts long after the transaction.

The most effective protection is to never share your real number in the first place. Ghost's number masking for marketplace sellers routes your messages through protected sender IDs — buyers see a masked number, never your real one. When the sale is complete, you walk away with your personal number intact. Learn more about SMS scam protection when texting strangers and common privacy mistakes that expose your number.

Special Considerations for High-Value Items

Selling electronics, jewelry, musical instruments, or anything above a few hundred dollars raises the stakes on every precaution above. Scammers specifically target high-value listings because the payoff justifies more effort on their end. For these sales:

• Meet at a police department's designated "safe exchange" location if your city offers one — many precincts have a monitored parking area specifically for this purpose.
• Request payment to fully clear before handoff — for anything over $200, don't accept "pending" digital payments as good enough; wait for confirmed, settled funds.
• Photograph the item and serial number before the sale, in case it's used fraudulently or you need to file a police report afterward.
• Consider requiring a small non-refundable deposit for items you'll hold for a scheduled pickup — this filters out buyers who were never serious or were testing your responsiveness for a scam setup.

Red Flags: Facebook Marketplace vs Craigslist

Scam patterns overlap on both platforms, but the details differ enough that knowing the platform helps you spot trouble faster.

Facebook Marketplace scams often start inside the app with profiles that have few friends, stock photos, or accounts created recently. Buyers may push you to move to text quickly — use Ghost when you do. Watch for "I'll send a courier" or shipping-only offers on local listings, and for buyers who refuse any in-app messaging after the first reply.

Craigslist scams more frequently use email relay or vague "I'm out of town" stories, overpayment checks, and requests to hold items for someone else picking up. Because Craigslist has less buyer identity visibility, treat any buyer who won't meet locally or who offers above asking price as high risk from message one.

On both platforms, the safest pattern is the same: keep early contact in-platform, move to Ghost for scheduling and logistics, meet in public for handoffs, and never share your personal number unless you accept the long-term spam and privacy risk that comes with it.

Safe Selling Best Practices

• Meet in public — Police station parking lots, busy shopping centers, and coffee shops are the safest handoff locations. Never invite strangers to your home.
• Bring a friend for high-value items — Selling electronics, bikes, or anything above $200? Have someone with you.
• Accept cash or verified platform payments only — For local sales, cash is the safest option. If using digital payment, use the platform's built-in payment system where possible.
• Verify payment before handing over the item — Confirm cash is real. Confirm digital payments have fully cleared, not just pending.
• Use platform messaging for initial contact — Keep early conversations in the app where they can be reported if something goes wrong.
• Trust your instincts — If something feels wrong, it probably is. A legitimate buyer will not pressure you.
• Use Ghost for direct contact — When you do move to text, use Ghost so your real number stays private.

What to Do If You've Been Scammed

1. Stop all contact immediately — Do not send any more money, refunds, or items.
2. Report to the platform — Use the reporting tools on Craigslist, Facebook, or eBay to flag the buyer and the listing interaction.
3. Contact your bank — If money has moved, contact your bank immediately. Some transactions can be reversed.
4. File a report — Report to the FTC at reportfraud.ftc.gov and your local consumer protection agency.
5. Warn others — Leave a review or flag the profile to protect other sellers.

A typical example: a seller lists a laptop on Craigslist and gets an immediate full-price offer from a buyer who "can't meet in person" and wants to pay by check for more than the asking price, refunding the difference themselves. Every element of that message — instant acceptance, overpayment, urgency to ship — matches the overpayment and fake shipping patterns above. Recognizing the pattern in the first message, rather than three replies in, is what actually prevents the loss; scammers rely on sellers being too far into a conversation to back out cleanly.

Online selling is genuinely useful and the vast majority of transactions go smoothly. But staying alert to red flags, refusing to share personal information unnecessarily, and using number masking for direct communications significantly reduces your exposure to the small fraction of bad actors who use these platforms to exploit sellers.