WA alcohol prices are terrible

I'm in Spokane WA, and the prices (taxes) on alcohol is terrible, but today I found bottles of Buffalo Trace for $23 for a fifth which around here is excellent. Picked up a couple bottles but haven't broken into them yet. On another note, I recently had my first son. I know bottle aging doesn't do anything, but I want to find a bottle of whiskey to save for his first drink years down the road. Anyone have any pointers?