You can buy a second hand elliptical machine at the following sites www.ebay.com/ or www.Amazon.com/ or at this site www.playitagainsports.com/equipment/90/fitness
You can buy one at Overstock.com
You can directly visit there website at norditract.com for elliptical you may want and need. If you purchase your elliptical machine from them directly the shipping will no cost for you.
Elliptical machines are very effective in helping with weight loss and all over body toning. You can get a good deal on elliptical machine on eBay or Amazon.
NordicTrack A.C.T is one of the most recommended elliptical machines and you can buy it online from walmart or amazon.
An elliptical machine is good for bad knees (Its like a cross trainer) as they don't land any pressure on your knees. On the other hand treadmill will force you to put your leg on it again and again which can cause you pain. So my advice is to buy an elliptical machine. For more information go to:- http://www.ellipticalvstreadmill.us/
If you want to buy a used elliptical machine, learn as much as you can about it before you do. Learn how used the machine is and what the original cost was. Amazon.com is one of online store that sells cheapest used elliptical machine. You can visit www.amazon.com.
You can find an elliptical machine in any gym but if you are looking to buy an elliptical machine you can find the machines in fitness stores. Fitness stores have locations in malls or on websites and sometimes you can even find a machine to your liking by info commercials.
An elliptical exercise machine is an excellent choice for work out options. It can be purchased in places that sell fitness equipment such as Canadian Tire, Sears, Best Buy, and sport stores, depending on where you are.
EBay, amazon, and Craig's list have a very wide selection of used elliptical machines, depending on the variety and model of the elliptical pricing can range.
You can buy a horizon elliptical machine on the official horizon site. If you want to compare the prices by different sites you can go to Nextagg, type in what you want, and it will show you where to buy and how much the places are.
Elliptical machines are very popular. Some of the better brands are and the most popular are the Bowflex elliptical machine and the Precor EFX machine.
You can search for listings online from Ebay and craigslist for used elliptical machine. One listing I found for Jacksonville, FL is http://jacksonville.olx.com/octane-fitness-q47ce-standard-elliptical-trainer-iid-76329137.