Mac Pro under $2500
Currently the Apple store is offering the refurbished 2.8GHz Mac Pro Quad-Core (model no. FA970LL/A) for $2399. That's $400 off the original price of $2799 and about $280 less than the lowest price we could find anywhere else. FREE shipping is included and sales tax applies for residents of most states.
Also available is the 3.2GHz Mac Pro 8-core for $4099.