I haven't been able to find out about vintage in Buffalo, but Millenium Games in Rochester used to have some tournaments. Up here in Southern Ontario we have Stratford tournaments (usually moxen), Untouchables in Mississauga runs quite a few, and 401 Games in Toronto.
If you don't mind travelling. Be warned that Untouchables does run its own B&R list.
You can find out alot in this area by going to
www.mtgontario.comJust over an hour north of Buffalo is Hamilton where there is always 1-3 small vintage tournaments every week.