Actually, I found some more bugs xD
On the actual shop there are some windows, and you can get past through them by simply jumping and crouching in mid-air. You actually clip through the window and the wall that is around it.
Other minor bug that I found was that I made an order, and went to pick it up so fast that the box fell on my head, and then it sent me flying straight up.
An other glitch that I found is that if you sell a weapon to a peasant and save the game after he's out of the shop, and restart the game, he will actually drop the weapon on the ground, so you will get the money of the sell and still the weapon (disassembled and heated blade/blunt)
One more last thing. Seems that if you have an assembled weapon and go to sleep, on the other day it will get the same prefix bug that I mentioned on this comment. It only happened once, but you should definetly give it a check. I ended up selling a Titanium GreatSword for $15!