$78-79 seems to be the going rate (Gold costs more).
You can always put out a WTB and see if someone is willing to part with theirs. $50-60 seems to the the ballpark price from the BST.
I'm caressing my BBS face right now thanks to the Futur. I got mine from Bullgoose (great service, got here superfast), but I think prices are pretty close at most places.
The love/hate relationship people have with the Futur is only surpassed by the love/hate relationship of the R41 2011.
there are more people who want to get rid of these two razors than there are people who are looking for them so a WTB post for either is a guaranteed way to fill up your inbox