🙂 When you consider purchasing a lift or a even a jack, you need to research for safety information concerning your future purchase. Only those that carry the Automotive lift institute certificate are safe enough to put your body underneath and not have to worry about dying from using it. http://www.autolift.org/, this website has a header that will help someone looking for a lift and what is safe or unsafe about the various lifts out there.
Also, you just can not place a lift on any cement floor, there are minimum standards that help the lift and prevent problems of the lift failing due to unsafe installations. A cheap price on a lift is not always the best deal. Good Luck.