Today Apple's online store has a selection of refurbished desktop models at reduced prices, like the 21.5-inch iMac (model no. MC413LL/A)with 3.06GHz processor, Intel Core 2 Duo processor, 4GB of RAM and a 1TB hard drive.  It was $1499, but has been reduced by $200 to $1299.  FREE shipping is included and sales tax applies for residents of most states. 
 

Also available are 27-inch iMacs starting at $1449 for the 3.06GHz configuration with 4GB of RAM and a 1TB hard drive.  Save $300 on the 2.66GHz 27-inch iMac with 4GB of RAM and a 1TB hard drive, now $1699.  Or go with the more powerful 2.66GHz Mac Pro, with 3GB of RAM and a 640GB hard drive, now $2149.