A cheap mass market scope is more frustration than it is worth. I have seen people buy a cheap scope and not be able to enjoy the pleasures of a beautiful sky as they spend all of their time fighting with the problems. I am collecting some of the question here that come to me in the mail. Good performance at lower cost. Magnification is not what you look at, it is aperture that counts.
Aperture is diameter of the main lens or mirror.
150-250x is ideal for most planet viewing, anything more is probably useless. Whoever told you that an inverted image is a problem doesn't know much about telescopes, don't listen to them. Most of these work well, but they do take some knowledge and patience to learn to use and I would not highly recommend them to the beginner. These scopes are also very expensive, often many thousands of dollars. If you are looking for a first scope you should probably start simpler than this and maybe step-up if you want to later.