Here a simple guideline to consider before buying used Laptop.

• Battery life: Battery backup at least 2 hours
• Screen Size: Bust not exceeding the Normal (15-17). Less than that generally translates in older computers and increases the chance of age failure. Why? Once the screen breaks, you had to change the whole computer
• Review the connectivity of the computer (Network, USB, Video, Audio…) look to it that it has a good connectivity including wireless

Buying a used laptop can be a great way to save money. If you use some of the guidelines above, you can avoid many pitfalls.

Make sure you have a good bag to protect your computer from a fatal accident. Your bag should be big enough for a 17 inch screen computer as it is rapidly becoming the norm, you will probably change your laptop within a few years but the bag you may keep a lot longer.