Dell has cheaper units.
link
Dell Outlet has up to $375 off refurbished desktops and notebooks expiring today.
New Coupon codes expiring 3/15:
$30 Off Any Refurbished Dimension Desktop upto $399 Coupon Code: PS30T5KTBJ9NFK
$50 Off Any Refurbished Dimension Desktop $400-$599 Code: DRSH78R?B?CPVM
$75 Off Any Refurbished Dimension Desktop $600+ Code: ZHZ3HKMX1J241T
$50 Off Any Refurbished Inspiron Notebook upto $899 Code: L484?XTJM4J33W
$75 Off Any Refurbished Inspiron Notebook $900-$1199 Code: 8GR4R7939ZBH04
$100 Off Any Refurbished Inspiron Notebook $1200+ Code: 3MF5PN2TCV?80X
Best best is to select a category, low price range, sort by price, then refresh every 20 minutes during business hours.