Fair Deal? Or No Deal?

[Baseball4life90]

Hey all,
Just recently came from a local show.
Basically, have been hunting for a Mays Relic Auto. I won one on ebay, and then when it got to eBay authentication they said it isn't passing and sent it back.
Anyway, today went to a show and a seller had one of these (not exact one, but same set /25) and had it for $800.



He was willing to go down to $750 cash. I tried to entertain a cash card deal and he wanted this plus $400.



I told him I'll get back to him...


Thoughts?

I'm mostly a collector, and rarely sell anything I buy unless I have a dupe of that player or something.
So, it is a bit tough for me to split off from the griffey!