Seller is creating quite a mess.
The "I've talked to ebay" thing... sure, of course he did, one rarely gets a live employee on ebay- I doubt there is a message string.
Interesting frame. Chances of this ending well without trauma and or drama, low.
Take the @
rccardr approach if you are up to it, or unwind the deal, get your $ back if out, and get some deserved bad feedback in there somehow.
A straight factual account would be chilling enough.
the Japanese have a saying about this "bachi" what goes around, comes around, bad karma will get him in the end.
Bachi ga ataru yo! is the full saying essentially karma is going to bite back.