This kind of stuff shows up all the time on Craigslist. The way IT departments used to order equipment, they'd order monitors for their 200 engineers, graphic designers or whatever and then they'd order and extra 25 or 30 as spares. I'm sure this is just a cache of spares. Normally when I see them for sale on Craigslist they're going for much cheaper, like $50-$200. Used monitors of this type normally sell for $10-$20 on Craigslist.