Rowing Machine, anyone?
I have a very gently used rowing machine.. practically brand new. I got it thinking I could use it at home, but I'm the type that *really* needs to go to the gym. I think I used it less than 10 times. I can tell you that these things are *great* for the thighs and butt, and will give you a very good cardio workout.
You can see what one looks like here:
http://www.amazon.com/gp/product/B000208URS
Anyone interested?