flanner: so getting money for goods is not possible i all the game? now i know that with that innkeeper i can just barter things
PeterScott: There is never an option to Sell. There is only Trade/Barter.
But you may Trade/
Barter for Money if the merchant/person has money, and you can trade with almost anyone, not just merchants.
When you are in the Barter screen, you get to see what they have on offer. They may have some money. Grab that and add it to their side of the screen.
Then you add something equal value to your side and hit the OFFER button.
Example
http://i271.photobucket.com/albums/jj125/Gizmojunk/Barter_zps3a60cd99.png Notice Money has been added to merchants stack and they are balanced. Mostly I started their stack buy including all their money first, so I cleaned everyone of all their money everywhere I went. I had ~100000 by the end of the game.
Money is nice because it has no weight, but neither do Stimpacks/meds, so you can think of them as money as well, and clean everyone out of those as well, and as much ammo as you want.
thank you for your thorough answer. i got it and play as you advised. so i suppose if i clean somebody of all money (or items in general) he/she will never get some new. (unlike as in morrowind in case of money)