How to Check If an Online Marketplace Deal Is a Scam

The listing looks perfect — a phone, a laptop, a vehicle, priced well below what you'd expect, posted by someone who "urgently needs to sell" before a transfer or deployment. They can't meet in person, but they're happy to ship it once you send an advance. It's a familiar shape to anyone who's spent time on classifieds apps, and it still works often enough to keep circulating.

Quick answer An online marketplace listing is likely a scam if the price is unusually low, the seller can't meet in person or show the item, and they push for an advance payment before you've verified anything. Avoid paying before seeing the item, and be especially cautious of sellers claiming to be unavailable due to work, travel, or defence postings.

1. Be skeptical of prices that are too good to be true

A price significantly below market value is often the hook, designed to make you move faster than you normally would to avoid "missing out." Genuine sellers pricing to sell quickly is common, but an extreme discount paired with urgency deserves a second look.

2. Notice excuses for why you can't meet or see the item

Claims of being posted elsewhere for work, in the defence services, or traveling are common reasons given for why an in-person meeting or item verification isn't possible. These excuses exist specifically to move the transaction toward an unverified advance payment.

3. Never pay a "booking amount" before verifying the item

Legitimate sellers on reputable platforms are generally willing to let you inspect an item, video call to show it working, or meet in a public place. Being pressured to send money first, before any of that, is one of the clearest signs of a scam listing.

4. Check the listing and seller across multiple sources

Search whether the same photos appear in other listings under a different name or location, which can indicate a copied or hijacked ad. A seller with no history, reviews, or verifiable presence is worth extra caution.

Quick rule of thumb: if you can't see, verify, or meet for an item before paying, and the seller has a ready explanation for why not, treat that combination as a strong warning sign.

5. Watch out as a seller too, not just as a buyer

Sellers can be targeted as well — a "buyer" sending a fake payment screenshot, or claiming to have accidentally overpaid and asking for a refund of the difference, are both common scams that rely on a seller trusting an unverified screenshot over their actual account balance.

A quick checklist before you buy or sell online

Is the price significantly below what similar items usually sell for?
Is the seller avoiding an in-person meeting or item verification?
Am I being asked to pay an advance or booking amount first?
Have I checked the seller's history or searched the listing elsewhere?
If I'm the seller, have I confirmed the payment actually landed in my account, not just a screenshot?

More than one "yes" here is a good reason to walk away from the deal.

Conclusion

An online marketplace connects buyers and sellers directly, which is exactly what makes it useful — and exactly what a scammer exploits when there's no platform-verified transaction standing between you and an unfamiliar stranger. A little patience before paying protects you either way.

This overlaps closely with other advance-payment scams — our guide on checking a fake shopping website covers a related pattern on a different kind of platform.

Got a listing or message you want a second opinion on? Paste it into our free checker for a quick first read.

Frequently asked questions

Why do scammers pretend to be army or defence personnel on marketplaces?

Posing as a defence employee is a common tactic because it discourages in-person meetings — buyers assume the seller is posted elsewhere and can't meet, which pushes the transaction toward an unverified advance payment instead.

Is it safe to pay a "booking amount" before seeing an item?

It's risky. Legitimate sellers will generally accommodate seeing an item or verifying it before any payment. Being pushed to pay a booking amount sight-unseen is one of the clearest warning signs on classifieds platforms.

Can I get scammed as a seller too, not just as a buyer?

Yes. A common seller-side scam involves a fake buyer sending a screenshot of a payment that was never actually made, or claiming to have overpaid and asking for a refund of the difference.

What should I do if I've already sent money for an item that never arrived?

Contact your bank or payment provider to report the transaction, report the listing and user to the marketplace platform, and file a complaint with your local cybercrime reporting portal.