I think that you're lying.
Not only is that quite a bit more expensive than "$200" I also don't think that you own it.
The motherboard itself is $250, the guy is being a jerk, moron, or both. Now let's wait for that Yummerz guy to come on and say "how did you know he was a mormon?"
Bushido, here is your be-all, end-all $500 PC. Well, $491 to be exact.
I don't have links yet, but a search for it on newegg will bring up good results. Prices are accurate as of March 14th.
Case and PSU: Generic Case (Mid-Tower is recommended), Corsair 450W PSU = $161
Processor: AMD Athlon X2 6000+ @ 3.0GHz = $59
Motherboard: Asus M3A76-CM = $68
Memory: Corsair 2GB DDR2-800 = $69
Optical Drive: Sony DDU1681S = $26
Hard Drive: Western Digital 250GB 7200RPM = $38
Soundcard: Onboard = $0
Videocard: Nvidia GeForce GT 220 = $70
-----------
Total Price = $491
I haven't researched it that much, but this should be a really good $500 computer. Hope that it does what you need it to do!