Just to let you know, any 6th Gen Celica, ST or GT, with only 20k-40k is veryyy rare.
Most are over 100k, but there are a few that are still below that mark.
These engines will last upwards of 250k, maybe even 300k if you maintain it very well.
The transmission, mainly on the auto's, will start to slip after a while, but it's very easy to find another transmission.
Good luck with your search, and lastly, welcome to the forum!
Edit: There is this one on Ebay, but I have no clue if the mileage is legit or not.
http://cgi.ebay.com/ebaymotors/Toyota-Celi...5fCarsQ5fTrucks
This post has been edited by mkernz22: Nov 17, 2010 - 6:19 PM