That's happened to me, too; it was the same 
auction, and I was bidding on one of the Tenchi 
cels. The other guy tacked $10 onto my bid in the 
last few hours.

I don't know how to deal with Yahoo deadbeats. I 
don't think Takashi does either, which is probably 
one of the reasons he moved the new auction for 
those Tenchi cels (at least) to ebay.

Alan Zabaro