Yeah....hard to say. These are still available new, but cost more than the newer gen. They perform like a raped ape, but are getting a bit of age on them. Still super desirable to those folks still rocking 4th gen LGA1150 sockets...it would be a darn solid upgrade from a Pentium or lower 'i' series.
The thing to watch, of course, is are they actually selling for that BIN, or sitting there being relisted and costing money?
With ebay, I would probably do something that you could 'accept' on the BIN, lower than everyone else, or do just a bid war listing with a reserve, knowing you might have to relist.
I have had TERRIBLE luck trying to sell computer stuff of CL. You may as well give it to someone instead.