Go on, keep the change
 

http://i78.photobucket.com/albums/j1...ots/lolwut.png

It's two copper, but why can't shopkeepers do math properly? :p

keep the change ya filthy animal

i had this happen somewhere too. forget what item it was but it was 4pp 9gold 9silver 9copper and gave merchant 5pp for it.

There's probably rounding behind the scenes when the game calculates your price from the base price and your faction and/or charisma

Were you sneaking? If you get quoted a price, then move in front of the mob your faction changes. Mobs will change directions to engage your transaction as well as respond to hails.

You get different prices at dubious than you do at indifferent.

Everything has the same "price" if you're dubious with a merchant ;)

Nope, wasn't sneaking. The merchant is in the seedier side of Freeport, so he's not a huge fan of my wood elf druid, but will still talk to her. ;) I want to say that the merchant in the shop labeled "Goods" in Kelethin pulled the same trick with bandages on my human monk, also, but I'd have to verify that.

Behind-the-scenes rounding was my guess, too, but shouldn't the price you're charged still be the same price the merchant is quoting you? I figured all the math would happen, rounding up or down as needed, and then the merchant would tell you what he's charging. I didn't think it would calculate the price twice, just that it would have one number that's used both for charging you and for completing the merchant's speech. I guess it's checking again after that?

http://youtu.be/FpaFEOpQkY8
I want my two copper! j/k :P

Client and server are calculating prices (rounding) differently. Probably would've been fixed long ago if copper wasn't so incredibly unimportant.

Ah ha. I thought the server managed it entirely. Wasn't *really* fussed about the copper, just amused. :)

Go sneak to engage a merchant. He will turn to you. Con him, he will be engaged but you will be dubious. If you then go sneak back around to his back again, he'll be indifferent and quote you different prices.

Monks and other shady characters do this with merchants who will not deal with them.