GForce

Not sure if I understand your question but I'm thinking your asking about how to get a better price from the items you purchase from merchants. Well, I think most merchants decide how much to charge you depending on your reputation level and maybe alignment. Or maybe some charge you less for completing a quest. For example, Bernard at the Copper Coronet will let you buy his items for a discount after you helped out Hendak. In my opinion, I think ALL the merchants are bunch of capitalist, charging the standard 3 times purchase value of an item. Here's my scheme when I start a game. I would CLUA in a Bag of Holding or "bag31" and then EVERY item that I come across (via battles, pickpocketing, finding, etc) I put those in the bag and then sell most items (except the goodies). Its tedious work but I'm a VERY rich man.