I've traded pins for pins, but never for non-pinball related items. When I've listed games on CL, I've gotten offers to trade one of my pins for jet skis, a chainsaw, furniture and even a boat. It's crazy the types of items some people propose.
I agree with egyptrus. There might be someone out there to trade for non-pin related items, but that subset of the pin community would be very small and targeted. Your chance of finding someone, and within range, is very slim at best. I also think you would be better off selling your non-pin items outright, then buying a pin.