Erik, I'm not sure but I think I got a MTH U30C engine from ebay that may have come from Trinkle's trains that you post about?
I didn't know how to thank him and just wanted to say that. Maybe it was someone else with a similar name? I don't think ebay allows contact without a problem.
The engine arrived in great condition and runs well. I see a lot more for sale but I'm tapped.