Newegg's selling the core 325,
mem 580, sapphire for $175.
The 380/680 for $209.
Link.
(it's down towards the bottom of that page)
If you've not shopped w/newegg, they are beyond rock solid. I bought almost every part for my box from them. Not one glitch, not one problem, and I most certainly didn't see a better price.
That, and I don't think many sites get as many positive reivews as the egg.