Go onto Kijiji or Craigslist or your local paper. I think exercise equipment has to be the #1 most purchased, never used, and then put up for sale at a drastic loss type of items and as such you should find a very good deal.
Get yourself a treadmill, beat the person down on price (they will be happy just getting someone to come and take it out of their house) and try it out. If you stick to it after a year or so, put it up for sale and buy yourself a nice feature rich unit brand new.
I'm planning to do the same thing to buy a Bowflex. Retail they are 70% more expensive than in the used market - several "still in the box"
