Why didnt you give him a price? He called you, right? When someone calls you, its your advantage. Juggle.us is probably worth a little over the reg fee, but this guy wants it! dot-com is too much for him, so he ain't rich. Somewhere in the middle...Personally, I would start at $2500.00 US.
If he says your are way too high, tell him firmly"$2450.00 is as low as I'll go" (down only $50.00)This way, when he says, youre still way to high, you tell him, "ok, throw me an offer", he knows he has to stay close to 2500.00 (or whatever price you choose)