well, as you may have seen in this forum, its very hard to place a very specific value on things like this. It really depends what market you're in as well as a bunch of other factors.
I can tell you I personally wouldnt pay more than $350 for that and that's pushing it, but maybe that's why I've had to build all of my bikes

. I may not be the best gage to go by.
Hopefully some others will chime in.