The best way to determine if a used vacuum is worth buying is to read current reviews for new versions of the product and consider the condition of the used unit. You should also examine its available features and see if it meets your specific cleaning needs.
Buying a used vacuum on an auction or classifieds site begins by deciding on the type of vacuum you want. For example, if you need a vacuum to do daily cleaning in a complex space, you may need a model that offers numerous extra tools and has a large carrying capacity. Consider factors such as the size of your home and the type of messes common in your home, such as pet hair or food spills. Looking for vacuums on retail shopping sites that contain user reviews allows you to gain an understanding of the features offered by different models, as well as see how actual users react to those features.
Once you identify a specific model or type of vacuum you want, you should read the seller's description of the vacuum's condition. It is always best to purchase vacuums in the best condition possible, so look for terms that convey an excellent or near-new condition.