Bottom of the line models are only about $500 new and you can sometimes find them used(people buying, never using) for about $350-450. You just have to look. Someone on the board is selling a top of the line $1500 XTLU for $800. I know that's still high but never-the-less a good deal.
I have a total gym 1500 that I bought for $200. Works great. I just don't like having to set it up. My place is kinda small so I store it in a closet when not in use. Only takes a few minutes to set up but I'm lazy.