So, I recently put up in the Classifieds the following post:
RE: AD&D Modules Going Up on EBaySomeone sends me a PM and expressed interesting in the
Return to the Temple of Elemental Evil module. I send him front and back cover photos for him to review its condition. He replies, "The books looks excellent like you said, but I was hoping for the original module. This looks like the revised reprint, so I'll have to pass on it." So I reply, "You mean you were hoping for T1-4? Or is there a 3.0 version and a d20 version of Return to the Temple of Elemental Evil?" He doesn't answer. I remain interested in the answer to my question.

Truth is worth finding and life is too short to work for money.