Model number FEX831CS, looks to have been replaced by this unit:
http://www.frigidaire.com/products/home-appliances/washer-dryer-combination/fex831fs
Although I see no difference. Dimensionally, they are the same.
This unit is about 6-7 years old I would guess. Works great. It was originally bought for my old apartment, and doesn't fit very well in my house so I replaced it about a week ago. Has some scuffs and a couple small dents around the bottom section, but its only cosmetic. This was rather expensive when it was new. Comes with a super long dryer hose and a 240VAC cable hooked up to it. It's in my garage ready to go.
$300
EDIT NOW $250
http://i412.photobucket.com/albums/pp201/copperhead035/for%20sale/IMG_20110322_001822.jpg
http://i412.photobucket.com/albums/pp201/copperhead035/for%20sale/IMG_20110322_001808.jpg
http://i412.photobucket.com/albums/pp201/copperhead035/for%20sale/IMG_20110322_001848.jpg