Newegg offers the refurbished HP Compaq DC7700 Intel Core 2 Duo 2.2GHz Desktop PC (no monitor) for $79.99. Redeem this $20 mail-in rebate to drop it to $59.99. With free shipping, that's $140 off list and the lowest total price we've seen for a HP Compaq PC with a Core 2 Duo processor. It includes an Intel Core 2 Duo E4500 2.2GHz dual-core processor, 2GB RAM, 80GB hard drive, DVD burner, and Windows 7 Home Premium 32-bit.. Deal ends June 30.

A 90-day warranty applies, although it's unclear who backs it.

Update: Specs updated.