VT100 has some demand; not later less iconic terminals. (Personally, I think I still have a few V2xx and a Wyse or two.) Many of these eBay listings are effectively permanent, from commercial resellers who are waiting for the rare case that some business somewhere really wants an exact replacement for an old system component that no one wants to risk changing.
I may still have a Sun 3/60 pizza box (as well as a Sparc or two), and maybe even keyboard and cables (one of the common problems — I've had people excited about a ‘free’ SGI Indy but they come to their senses when they realize it's a blue paperweight without time, money, and luck finding the ancillaries). Fortunately I found takers for my (three!) deskside Sun 3/160s about a decade ago. But even for a single pizza box, shipping has become a killer for non-local transfers (I'm outside US; SW Ontario).