Apple's online store currently has the refurbished 21.5-inch iMac (model no. MB950LL/A) for $929.  That's $270 off the original price of $1199, and the lowest price we have seen on this Mac model by $130.  FREE shipping is included and sales tax applies for residents of most states.  The 21.5-inch iMac has a 3.06GHz Intel Core 2 Duo processor, 4GB of RAM, a 500GB hard drive along with a 8x SuperDrive, NVIDIA GeForce 9400M graphics card and iSight camera.  A wireless keyboard and Magic Mouse are also included.
 

For a little bit more, $1199, upgrade to the refurbished 21.5-inch iMac with a 3.06GHz processor, 4GB of RAM and a 500GB hard drive.  For $100 more, $1299, get a refurb. 21.5-inch iMac with a 3.06GHz processor, 4GB of RAM and a 1TB hard drive.  Save $300 on the 27-inch 2.66GHz Quad-Core i5 iMac with 4GB of RAM and a 1TB hard drive, now $1699.  Or for $1849 Apple's online store has the refurb. 27-inch 2.8GHz Quad-Core i7 iMac with 4GB of RAM and a 1TB hard drive.