An example of barter trade for crafting is at work with Gulnyr and myself.
My character Pang collects items for Gulnyr to cook, and crafts molds for him to work metal with. He has in return provided me with lessons on tailoring which resulted in an exceptional set of gloves, a nice cloak at a discount, iron clothes, quite a few arrows for my bow, and more food than I could eat. Plus we get to RP each time we meet about crafting and such, it is a good thing for both of us. He is not just tossing pies or giving them away for nothing, It saves him time from having to craft molds for arrow making and weaponsmithing, and in return I am learning tailoring (slowly) I've equipped my character pretty well at a reasonable cost and I am getting good enogh at tinkering that I'll be able to craft traps soon, at which point I've already got a relationship with Gulnyr who I can get the metal I'm unable to mine to craft craps with.
Vyris