In my experience, with the warrior and archer at least, the 'best' item of each kind seems to stop at 96,000G in the shops. There seems to be a best armor, best helmet, best shield (warrior only), and then various weapons. I've yet to see any high-end weapons that were in the levels but not available from the shops (i.e., some sort of rare or unique drop), so if you see something around that much and need some gear, go for it!
Looking For Elliott's Portrait
in Fable 3!
Message me if you're organizing something in multiplayer for Red Dead Redemption!