How to Avoid Spam and 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.

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.

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.

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.