the price difference between newegg and ebay is the cheaper ebay prices are the more the auctioneer is lying to u. lets see here and ausie site....
hope that helps
as for wat u will need......lets see here....
Asus A8n Sli Deluxe motherboard
geforce 6200, seems alright if u dont wanna play newest games
Corsair 2x512mb Dual Channel Ram
WD Caviar 250GB HD
Thermaltake Tsunami Case
Logitech MX 518
Any keyboard is alright
Viewsonic VX724 Monitor
that should get u started.