I get a lot of stuff on Craigslist, actually Ad Hunter which searches CL nationwide, which saves me a ton of $$. It's like buying a vehicle. I just don't understand why people buy brand new trucks when they can save 30% or more buying one with low miles that is a couple years old.
For bows, ArcheryTalk classifieds and Elite Archery classifieds, again buy last year's model for half price
Optics - SWFA and NY Camera Land for display items
Misc hunting stuff - Cabelas and Bass Pro, the latter only because its local and of course, Amazon