I have reasonable luck filtering search results by "80+" or "80 plus"
Check user reviews on anything that looks too good to be true, but it's basically impossible to reach 80% efficiency with nasty, cheap components, and the 80+ certification costs money so the really cheap companies avoid it altogether.
This is my signature. There are many like it, but this one is mine. However, my signature is neither my best friend, nor is it my life. I also have no desire to master it and my worth is not signature-dependent.