My neighbor works for Best Buy and is in the Intel Retail Edge program. He recently got an Intel Core i7 4770K for $80; before that, he got the Intel Core i7 3770K for 60; and even before... (well, you get the idea).
He sold me his old Dell Studio XPS 435T/9000 for $50 USD (no video card, no power supply, no hard drive).
Here's the specs:
Intel Core i7 920
6GB (6 x 1GB) DDR3 1066
Dell X501H (OEM motherboard by Foxconn)
Dell Studio XPS 9000 OEM computer case
Dell Geforce GT 220 (not present)
Flextronics 450W power supply (not present)
Hitachi GST Deskstar 7K1000 HDS721075KLA330 (not present)
Apparently, the OEM motherboard doesn't allow overclocking which is a shame since the Intel Core i7 920 is such a great overclocker. The cost of a used x58 motherboard had gone through the roof and even a simple Asrock motherboard is $110 + $15 shipping.
Anyway, what graphic card (video card) and power supply should I get for a system?
Also, did I make the right decision in buying this computer for $50?