Better yet, if you DO, do you use them?
At the beginning of my pregnancy with David, my oldest, we lived out in California and a friend from South Carolina was moving out there and about that time his mother passed away so he had her stuff shipped to our house where he was going to stay while looking for a house of his own and we let him store it in the garage so as a thank you he gave us her treadmill which we sadly had to get rid of when we moved back to South Carolina because the government only allows so much weight when moving. Now with two kids I really wish I had a treadmill because it is very hard to get out and walk (don't have a double jogging stroller and the tandem double is hard to get to a decent speed and to turn)
I do have a Shake Wight that I really do like and feel it was really worth the $20. When my husband was ordering it he accidentally ordered 2 so we gave the second one to my mom and she also loves it.
My BF sold a stationary bike at MY garage sale, for $15.