Laptop computers, like so many other technology products, are constantly being updated and revised. This means that used laptops are widely available, and can be an excellent option when you don't want to spend a great deal of money for the very latest thing. Here are some factors to keep in mind when considering buying a used laptop.

The size and weight of the laptop you'll want depend on what you'll use it for. If you plan to take it with you to classes or meetings or do a lot of business travel, you'll want it to be as portable as possible. Ultra-thin, ultra-light tablets are a good choice, but they are likely to be more expensive than a slightly heavier model. If you are primarily using your computer at a desk and only taking it with you occasionally, you might be able to get a better deal with a slightly larger and heavier model.

Check out a used laptop to see whether it has the capacity to accept upgrades. This is particularly important if you do a lot of networking. You can, for instance, probably get a laptop without internal wireless at a cheaper price, then add a wireless card. Memory upgrades may be possible, but the maximum amount available might not be recognized by the older operating system.

The battery in a used laptop may be nearing the end of its effectiveness, so find out how much it will cost to replace it. Older NiCd batteries are particularly prone to memory problems. While there are risks involved, buying a used laptop may ultimately give you a great deal more computer than you would be able to afford by buying new.