Does anyone know of anywhere on the internet besides ebay where I can by some UNC or close to it buffalos? OMG the prices on these pups are unbelievable!! If only I would have known years ago what would have happened to the prices now, I could have made better decisions. Woulda, coulda, shoulda...
Heritage, David Lawrence, Teletrade. It just depends what exactly you are looking for -- are you looking to collect a set? For higher grade stuff, you should look for a good dealer or two you can trust (some are on this board).
What Breakdown said plus coin shows. If Northern California means San Francisco, Sacramento or close by, you should be able to find 3-4 reasonable shows a year that you could attend.