Here's a place where you can buy a stair lift: http://www.usmedicalsupplies.com/Stair-Lifts.htm
A used stair-lift can be bought in a wide variety of locations. The easiest places where one can purchase a used stair-lift is at online auction sites such as eBay.
If one is looking to purchase stair lift chairs, you have a few choices. You can contact Jameson Medical Supply, US Medical Supply, Ameriglide or Active Forever.
There are generaly no issues when purchasing a used stair lift, however you should check the mechanics of the lift to make sure it's functinoning properly.
There are many companies that specialize in residential stair lifts. Some examples of these companies are Stannah Stairlifts, UK Lift, Access BDD and Help My Mobility.
The weight capacity of a stair lift varies for each stair lift. Average capacity is between 250-300 pounds.
It is better to install a handicapped stair lift.
One will need a pulley to install a stair lift as well as many other tools. A screwdriver, hammer, and perhaps even a stair lift kit would also be helpful in installing a stair lift.
Many websites online offer used stair lifts. You could try to win one at ebay or purchase a used one through Amazon. I was also able to find a website that specialized solely in used stair lifts: http://usedstairlift.org/
The costs for purchasing a stair lift can vary depending on the brand and make of the stair lift. According to the Silver Cross website the price can range from $2000 to $3800.
One can purchase a wheel chair lift from several different online websites. These include: Savaria, WayFair, Spin Life, Braun Ability, Ameriglide, and Amazon.
One can purchase a stair lift for a household from the Stannah stairlift group. Visit their official webpage. There are other stairlift providers on the internet too.
If one lives in Maine, New Hampshire, Vermont or Massachusetts a chair stair lift can be purchase from All-Ways Accessible. This company not only sells this product but also provides installation and service.