Well that will be hard to do DJ since there really isn't much people would accept as a fair trade considering the only stuff people value is Uranium, Tech, ZPM's and Zone Chips. Beyond that nothing else is worth trading and I'm sure we can wipe Tech, Zone Chips and ZPMs from that list since people would rather want to hold onto that stuff except for maybe rare and common tech which no one would really want in the late game anyway when they will be after exotic tech instead.