is the xfx 7850 for $130 worth it?
I'd say that's pretty damn worth it. It's a bit slower than a 7870, and a 7870 will max basically everything at 1080p.
That is a good deal. They had a 7870 Ghz edition with an aftermarket cooler, I think it was a Galaxy, on there for $150. Let me see if I can find the link.