As far as tack goes, I don't buy much. Aside from reins and one cinch-strap, I can't thnk of anything new that I've had to have in the past few years. But I do buy quite a bit of stuff to use for repairing my old tack.....mostly Chicago Screws, rivets and leather-lacing.
I could use a new saddle blanket though.
I've been meaning to make one....just haven't gotten around to it yet.