I have a 2007 Buick LaCrosse 3800 trans with 3.05 gears. When I got the trans, the PO said it had 7k miles on it, but I think it might say 9k? Either way, it's super low mileage. Trans was originally purchased from Ed Morad.
http://i29.photobucket.com/albums/c295/skoval25/IMG_20110822_145511.jpg
http://i29.photobucket.com/albums/c295/skoval25/IMG_20110829_192639.jpg
The trans was a spare that came with my '98 Grand Prix. These can be used in a '97+ GP, but I was told that you'll have to use your external range selector switch from your current trans, and an '03 PCM (which I have). I'd assume it should also work in other 2000's GM 3800 cars. Or you could just put it in a LaCrosse
OP bought it for $750 and never put it in the car. I'm asking half that, $375. Don't expect anyone on here to need this but I figured it's worth a shot!