I know nothing about hair extensions?

Honestly to get good ones you have to spend more than 30. I have 90$ ones from Sally's and they're amazing, besides one of my clips breaking but that's my fault. They've lasted me a few months now, I wash them every couple weeks (depending on how often I wear them). They're Euronext Remy. They aren't glue-in they're clip-ins, but that makes them last longer.