I'm on a very tight budget, but need a big green screen. I've already got 5 softboxes, two of a cooler color to light the green screen, and three warmer ones for lighting the talent. I've got a 5' x 6' green screen, but for any action at all, that's insufficient.

There are lots of cheap $50 10x20 green sheets on Amazon, but I'd like to hear from those with experience with some as to where you think it best to source from? I would definitely like to spend under $100, and much lower if possible, but if it's going to be complete crap, then it's not worth it. Thoughts?

I use an EEFX screen. It's like magic how well it keys. It doesn't wrinkle and it's incredibly durable. I couldn't recommend the more. They are a bit pricy though at $266 for The size you want, but you won't be disappointed it you buy it.

EEFX.com