Are there any vendors in Trynton. I've looked all over and can't find one. I'd really hate to have to travel back to Arnika to sell my stuff and but more ammo.

There's Fuzzfas, the Potion Vendor. He buys a lot of various things as well, except for weaponry (Arrows and stones he WILL buy, though). He's located near the Trynton sanctuary (where you get the vines.)

Cheers,
-Sazerac

You can buy things from the Don. You can pickpocket both the Don and his buddy, the Chief, Madras,and Fuzzfas. You just can't sell weapons there.