Experience with selling broken screens?

Hi everyone

This is technically NOT a repair question, and I apologise in advance if I'm breaking site policy here...

I'm running a small smartphone repair center, and I currently have a big box full of broken iPhone screens lying around here.

I find a lot of websites that 'buy' these broken iPhone screens and pay you for them, but I can't find a single review on these websites. So I'm not that eager to send these screens somewhere, not knowing for if I'm gonna get paid for them.

So, my question: does anyone have any experience (good or bad) with selling iPhone screens to these companies? Can anyone recommend a trustworthy company?