Other World Computing discounts a selection of used Apple Mac Pros, with prices starting at $729. Plus, all orders qualify for free shipping. Each item is covered by a 90-day OWC warranty. Note that for some models, available quantities may be limited. A couple of best bets, with comparisons against original retail prices:

• Used Apple Mac Pro 8-Core Xeon 2.93GHz Workstation w/ 16GB RAM for $1,349 (pictured, $4,611 off)
• used Apple Mac Pro 12-Core Xeon 2.93GHz Workstation w/ 32GB RAM for $3,699 ($4,300 off)