TigerDirect has this AMD Athlon II X4 640 Quad-Core 3GHz Barebones PC Kit for $189.99. Redeem this $10 mail-in rebate
, this $20 mail-in rebate
, and this $20 mail-in rebate
and the price drops to $139.99. The PC kit features an AMD Athlon II X4 640 3GHz socket AM3 quad-core processor, Biostar 760G AM3 microATX Motherboard, Corsair XMS3 8GB PC3-10666 DDR3-1333 dual-channel RAM with two 4GB DIMMs, Cooler Master 70mm CPU cooler, and Ultra X-Blaster V2 MicroATX Mid-Tower Case. Shipping is $10.35.