If you folks(people in the US at least) have patience. You can check
Slickdeals.net for online deals for just about anything. People post hardware deals all the time. Why just a week or two ago there was a short time frame where you could have bought a 8800GTS(g92) for $170 after rebates... I missed out on that. D:
Another website I'd recommend is
Buy.com - Computers, Electronics, Digital Cameras, Books, DVDs, Music, Games, Software, Toys, Sports you can get $10 off the first purchase with google checkout. I bought my Corsair 550VX for $60 after rebate. Newegg sells it for $90 after rebate and shipping.
Also I would be willing to build PCs for people around the So. Cal L.A. area. I'd do the west coast, but honestly I just don't feel comfortable sending out prebuilt machines due to how crappy shipping companies treat the packages(even if packaged properly).
Edit for crappy grammar and spelling.