It's a good thing Jim has come here enough to start carrying trade items on him. Though some places are able to accept his Starfleet account for payment, he's aware that it's not at all the norm, so he rarely enters the Nexus without at least a few trinkets or whatnot on him.

The gold and platinum rings he has for trade are simple in design, in case the material is more valuable than the craft. He also has some more complex pieces in silver, for higher value purchases. "Take your pick."