I just sent that ebay seller this message:
My TG-CD drive is missing the yellowish middle gear. Also, it has a "warm up issue" where it won't start spinning and booting a disc until after it has been left turned on for a period of 30 mins or more! Can you fix my drive? Also what if you are unable to fix it? What is the time frame from when you get the drive to fix it and send it back?
I just might try him depending on how he answers.