Indeed. Every section has its merchants. There are 2 in the docks actually now I come to think of it! Aribeth is nicely acessible if you are in a dungeon somewhere though. I use the temple of Tyr most times. The price difference is pretty small.
Womble
But when you're 3rd or 4th level that difference is a lot! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
I was averaging about 60GP to 120GP difference.
Later in the game you'll have so much GP you can throw the gold away. <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
Kyra_Ny <img src="/ubbthreads/images/graemlins/delight.gif" alt="" />