I've never traded games and I've never traded non-pinball related items for a pinball machine. In my opinion, the subset of people that would be willing to trade their pinball machine for non-pin related items is pretty small. You'd do much better just selling your stuff and then buying a pinball machine.
Obviously, there's always someone out there that's willing to trade their pinball machine for stuff like Cowboys' season tickets but getting those two people to meet so such a trade could happen is going to be very difficult.
Dave