I live in the US and use this website, which is simple but finds some great prices. The only downside in your case is that you have to know what you're looking for already.
http://www.wine-searcher.com/find/twent ... y/1/usa-ca
If you have 5 different things that might be up your alley, that site will help narrow down which is the best deal.
However if you have no clue what you're even potentially looking for, it might be like finding a needle in a haystack,
You can't go wrong with any Glenfiddich, Glenlivet, whatever 15,18,21 year whiskeys. I have bough a few of those bottles as gifts(I do not drink, ironically) and every time the person was like "wow" as far as the taste and uniqueness of the gift.
Good luck man, the drinking world is a giant rabbit hole of potential buys...