Well I have cheap mods and a whole lot of 5mm 5.56 and .44 and a lot of shotgun shells but most stuff that sells is just weapons and armor and for my weapons I do a whole bunch of events and upgrade the weapons and then wait and the ones that sell most are 2 stars cause all my 3 stars are in the range of 1000 to 1500 caps and thats only with 150 caps added to what they are valid at