Need a PS3 controller for PC

Hi all! I've been looking for a PS3 style controller to play games on my PC. However, when I went to buy one in the brick and mortar stores they were all about $50. I'm on a budget and I didn't really expect them to be in that price range considering the PS4 controllers aren't much more than that. Looking online I saw a lot of cheap knockoffs, but I have no idea if they would work well for what I'm trying to do. Does anyone know of a decent knockoff (or used) PS3 controller? I'm looking for something really responsive and feels nice potentially with concave triggers that will work with BetterDS3 for a gamer on a budget around $10 - $25.

Edit: Thanks for your help. I found what I was looking for. :D