VMware software on eBay auctions?

I just read a blog post reporting an eBay auction for VMware ESX Server 2.5 priced $100

That auction is closed now but I really wanted to check if other VMware software (not used books) are there. Well, they are!
Then I looked for Microsoft, PlateSpin, SWsoft products, etc. and found Microsoft Virtual Server 2005 R2 as well.

I’d like to know if this is legit or not…