Check a listing.
Paste a used-Mac listing from eBay, Craigslist, OfferUp, Swappa, Facebook Marketplace, or Reddit. If Macfax has it indexed you land on its listing page: whether it's still live, any scam-pattern flags, and whether the seller attached a verified report.
What the listing page tells you.
Is it still live?
Sold and deleted listings vanish silently, so Macfax verifies listings directly instead of guessing: eBay through its API, Craigslist, OfferUp, and Swappa by revisiting the page. The listing page says when a check last confirmed it live, and a listing that's gone says so instead of forwarding you to a dead page. Facebook and Reddit posts can't be re-verified directly, so judge those by how recently they were seen.
Does it match a scam pattern?
Listings that match a known pattern stay viewable with the reason stated: the same title and price mass-posted across cities, an eBay classified-format ad (the sale happens off eBay, outside buyer protection), or an ask far below every verified listing for the same configuration.
Is a verified report attached?
Sellers can attach a Macfax report: the Mac signs its own specs, Activation Lock, MDM, and stolen-serial status with its Secure Enclave, so a report can't exist without the machine. If one is attached, the listing page links it.
What can't a check tell you?
Whether the machine itself is as described. A listing check reads the posting; only a report reads the Mac. If there's no report, ask the seller for one; it's free for them and takes about 2 minutes. Refusal is information too.
Buying this Mac?
A listing check reads the posting. A Macfax report proves the machine: real specs, Activation Lock, MDM, and stolen-serial status, signed by the Mac itself and verified again on delivery.