It's not unethical, just moronic. Unethical would be if he was lying to make the piece sound ultra-rare and ultra-valuable. He's not. He's just saying that feet, a power cord, and some gold connectors make this piece special. That's definitely based on pure stupidity, not an evil soul.
I basically agree with you. But ultimately, 'evil' isn't something one can regulate. eBay does not give a damn if you give your profits to the poor or kick puppies in your spare time.
The seller, as you say, is radically overestimating what his item is worth. The market will demonstrate that to him - or someone will buy it, which proves that it *is* worth that amount, at least to the buyer.
What I find somewhat disturbing is that there are apparently those (not you) who
'know' what the item is worth and IT BETTER SELL FOR THAT or they feel some kind of crime is being committed. It's worth whatever it sells for, no more and no less. If someone wants to pay his exorbitant asking price, then the market has spoken and that's pretty much the end of it. There are no morality police to ensure that the buyer doesn't 'get ripped off' by making an uninformed purchase, nor is the seller to be thwacked across the knuckles by Big Brother for the crime of offending our sensibilities and asking an outrageous sum of money.
"I know what it's worth and he's asking too much." Well, that's opinion, and everyone is entitled to one. But nothing in that statement constitutes proof that a crime has been committed. Those who wish to stick their noses into it can click on the 'Report potential fraud to eBay' link. In the CL world, such folks sometimes also post listings informing others of what an overpriced crook the seller is. I don't quite understand such strong emotions over these things, but whatever.
I have a friend who just bought a house for about 10% what it sold for when it was built. I suppose he should contact the seller and tell him that it was too good a deal; he stole it basically; and offer to pay whatever the original asking price was.
No? Well then...the house was worth whatever the buyer was willing to pay and the seller was willing to sell for. No more, no less.