The 2.33GHz Gateway LX6810-01 desktop PC  (model no. GWLX681001) is available at BuyDig.com for $679 after $50 instant rebate.*  That's a price cut of $121 off the MSRP of $800 and the lowest price we have seen on this desktop computer by about $30.  FREE shipping is included and sales tax applies for residents of New Jersey. 

*Instant rebate offer expires 6/21/09

The HP Pavilion a6700 desktop PC with 4GB of RAM and 500GB hard drive is priced at $509.99 with FREE shipping at HP.com.

PCconnection.com has the Aspire M3201-ED5400A desktop PC with 2.8GHz processor for $359 with FREE shipping.

The Gateway LX6810-01 desktop PC has a 2.33GHz Intel Core 2 Quad processor with 8GB of RAM and a 640GB hard drive.  Features include an 18x DVD multi-format drive with Labelflash technology, 15-in-1 card reader, 8-channel HD audio, NVIDIA GeForce GT 120 graphics card, six USB ports, one HDMI port, six audio ports, two microphone jacks and three RCA ports. It comes pre-loaded with Windows Vista Home Premium and Microsoft Works 9.0SE.  It is backed by a one year limited warranty from Gateway.  Dimensions: (H) 17.7" x (W) 7.5" x (D) 19" ; weight 31lbs.