If you want to make enemies, try to change something.
Also when you think about trial and error, you go to a vender and you check with them every item you may have scavved on the way there, great except while you're doing that you get picked clean of any other item not currently in the trade window.
Everything I put in the window, I'm offered 0 caps.Tried merchants in HUB, Klamath, NR, Redding, then finally NCR. I understand that it will be better when people can't sell the most random of things, but I'm trying to sell things like spiked knuckles, grenades, leather armor etc.
I believe the limitations on venders have been secretly removed. Venders who previously would not buy my stuff now buy it, same character no more rep or barter.