While browsing on Quora I came across the fact that you can buy a dating website on eBay. The current search has a lot of cheap software and a few overpriced domain names, but in the middle, yes, there are a couple sites complete with established membership being sold off.
I already knew you could buy a botnet (but not on eBay) and there are plenty of legitimate companies wanting to sell you Hadoop clusters. So this is not a big stretch. It just seems deeply weird. (And incredibly scammy but what did you expect?)
You can't, alas, buy a Hadoop cluster on eBay. Or a turnkey software development environment. Yet.