What features do you look for before buying a new Vacuum cleaner?

Or rather, what features should I look for? My budget is 120$. (too little?) I need it just for general house vacuuming, I don’t plan on going and cleaning people’s houses…yet. Longevity and quality are probably the biggest issues. Any recommendations? Any warnings such as “don’t go for this one, it doesn’t suck (get it?)!” etc. Thanks!