Tiger Direct via eBay has HP 100B XZ812UT All-In-One PC for $249.99 with free shipping.
Specs:
E-350 1.6GHz Processor
20" LCD Display (1600x900)
2GB DDR3 Memory
250GB Hard Drive
AMD Radeon HD 6310
SuperMulti DVD Burner with LightScribe
Windows 7 Professional 32-Bit