Apple has dropped the cost of refurbished Mac minis at its online store by another $50. A 2011 Mini now starts at $469; that includes a 2.3GHz dual-core Core i5 processor and 2GB of RAM. Upgrading to a 2.5GHz chip and 4GB of RAM costs $549, while a 2GHz quad-core Core i7 system loaded with Lion Server is $759.