So this just got a bit weirder...
So the guy is being purposefully obtuse, ignoring my previous statement that I've never had a 1571 graphic card. What should I do?
I can't remember if I used a picture of the BACK of the card with the serial number visible when selling it... but I mean, if he sends me back a 1571 with a different serial number, I can potentially just call EVGA if it was ever registered...
wish i had seen this thread earlier...
run two small businesses selling via PayPal and EBay [for over 6 years now] and it's NEVER a good idea to actually come out and accuse anyone of being a scammer [even when it's obvious].
it's a case of your evidence versus theirs, if you can't provide more compelling evidence, then PayPal will side with them, and have them return the product for a full refund.
typically in a situation like this, i would just ask them to open a claim, complete the claim immediately [by choosing the option to have them return the product for a full refund], and then hope they return the correct product.
if they don't, PayPal will help you out, don't worry about that [they will typically give you your money back to make up for the loss you've experienced].
if it IS a scam, the scammer will typically not risk trying to take the scam further by sending you back the wrong product.
now, if the dude's account IS, indeed, in good standing, there's a chance this is all just a case of confusion.
be friendly, apologize for accusing him of scamming, and see if you can't figure out why he's confused about what he received.