Dell usually has awesome bargains once a month - this one is pretty good but my buddy just one and his deal was a little cheaper, but no flat panel:
New Dell Small Biz Sale - 2Ghz Desktop w/LCD $499 shipped free, Apr 17
Dell Small Business has a FREE Palm Zire PDA, Lexmark Z35 Printer, or Largan Digital Camera with Select Systems (shipping extra) Free shipping too. Tax is charged. Save up to $200 when you buy a Flat Panel with a desktop. Dimension 2350 desktop with Flat Panel Monitor starts at $499!, Inspiron 1100 notebook with a P4 processor from $699.
5% off Select Flat Panel Monitors with code: E7C0E60604F
Budget Desktop with LCD
Dimension 2350 desktop Celeron-2Ghz 128MB DDR Memory/30GB 7200RPM HD, 15" e151fp LCD, 48x CD, Ethernet, 6months ISP, XP Home desktop $499 shipped free, save $130.
Click Amazing Desktop. Outrageous Price, Customize it on cheapest, Free PDA/Printer/Camera - Continue, Continue, Add to cart
check out Techbargains
they are the best place to keep an eye on this stuff...