Did you see BigFart's post the other day on how he negotiates? It was pretty insightful.
Basically, call him and tell him you want (like 4-5 times what your minimum really is), then go silent. Let him break that silence and tell you it's more than he expected. Then ask him what number would he close the deal on that day. If it's in your range, then tell him you need to talk to your partner, put him on hold for a while and then come back telling him you will work with him.
BF could probly explain it much better than I, but that's the gist!
Take care-
-WC-