I would like some opinions on whether to purchase a used MacBook Pro (13-inch, Mid 2012) 4gb memory/500gb hard drive. 13.3-inch (diagonal) LED-backlit display 2.5GHz dual-core Intel Core i5 processor, comes with mac office, case and warranty ending Jan 20th (eligible for apple care extension) for $850. Or should i just buy the refurbished 13.3-inch MacBook Pro 2.5GHz Dual-core Intel i5 from the apple site for $999? Currently using a windows PC and would like to transition to a mbp. Just for basic student usage, not doing anything fancy on it. Thank you.