Based on the little info provided, it looks original or Japanese reissue. Us reissue has different smokestacks, providing someone didn't change them.
Well the guy says its this big, and I don't remember how big it should be. It measures 12" long X 4" Tall X 2.25" wide.
Well I bought him, hope is is the real deal. The seller has 100% feedback but I kinda jumped at it not really knowing what I was getting for sure. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=320197247078&ssPageName=STRK:MEWN:IT&ih=011
A clear shot of the front wheels will tell you if its a G1 or not. I think the reissues and beyond use the Magnus cab mold and that one had little nubs on the front wheels (to help magnus stay in the armor).
Well, looks like you got him for a good price anyways. I mean, $39 is pretty good for a reissue or original loose.
Thanks, that kinda calms my nerves lol. I watched it for about 20 minutes and was hoping nobody else grabbed him up.