I voted for the Marketplace option, however, I think that the current ideas being tossed around in Selling > Srategus are pretty fun.
Prices change due to risk on there. Local Pickups people normally charge regular rate for, however if they have to travel it doubles, sometimes triples. I know if the Hospitaller Faction requested to purchase Strat gold with their location, someone would have to pass through FCC territory, and a lot of traders would make the option to not make the trip....though it would be fun to see the ones who would!
LL_Tanken