thats clearly fraud, but still, sometimes shit does happen.
i recently sold a 12 year old studio quality EQ on ebay as tested working, no guarantees. got just over $600 for it. i know the thing works because its the nicest EQ i ever had in my possession, and i spent at least 6 hours using it while converting old cassette tapes to digital.
so i sent it to the guy and got an email back right away, the gain knob doesnt work right. he said there was crackling noise when adjusting it. well, i have no idea whether there is an issue or not, i sure didnt notice one but its possible i might not have really cranked on that particular knob, i check the guy's recent auction history and see he has bought many big ticket items in the past without a problem, so i emailed back promptly and offered a 50% refund, which he accepted.
if, however, the guy had been an asshole i might have handled the situation differently. i certainly have told people to go pound sand before. yes, when the item is fraudulently described or pictured, that is wrong. however, there is a grey area. not everyone who sells a working item and the buyer has an issue is a scumbag. the guy i sold to, i have no idea what he hooked up to the thing or if he knows how to use it. yes, an auction stating something works means people will pay more for it, but if it is listed as-is, the seller has to assume there is the possibility it might not work for them. its tough to say with shit that is decades old, and misunderstandings are possible without people being fraudulent.