Hello, First time posting, not sure if this is the right place to mention it but I found away to change the "Nuts Value"
During a barter trade, I clicked on "Nuts" which opens up the "How many you want to transfer window" and then I began a 4 Byte Search using C.E, once I found the right address by increasing how many "Nuts" I want to transfer, I then changed the number to a higher value and went back to the game and clicked OK, this added the "Nuts" to the barter screen at the value I imputed on C.E, once that was done I then simply took them back to my inventory.
Not sure if this will help you Mr.A.F but I thought I'd post it just in case.
Thanks for the Trainers!
Edit: I do believe you have to complete a trade for it to "Finalize", managed to get it to work for Ammo too.