MegaMacs offers the used Apple Mac mini Intel Core 2 Duo 1.83GHz Desktop, model no. MA723LL/A, for $374.99 plus around $12 for shipping. That's $8 below our January mention of this used configuration and $355 under the lowest total price we could find for a Mac mini desktop with a similar processor and hard drive capacity. (It's also among the best prices we've seen for any Core 2 Duo-equipped Mac mini system.) It features an Intel Core 2 Duo 1.83GHz dual-core processor, 2GB RAM, 80GB hard drive, SuperDrive, and more. Deal ends March 14 at 1 pm ET.

Also available is the used Apple Mac mini Intel Core i5 2.5GHz Desktop, model no. MC816LL/A, for $599.99 plus around $13 for shipping. That's the lowest total price we could find for a used model by $76. (Apple charges $699 for a refurbished model.) It features an Intel Core i5 2.5GHz "Sandy Bridge" dual-core processor, 4GB RAM, 500GB hard drive, 802.11a/n wireless, Bluetooth, and more.

Note that these used systems do not include a keyboard or mouse. Also, a 30-day warranty applies, but it's not clear who backs it.