Do you think its worth purchasing this Macbook pro. a friend in school is selling it to me for 500 but i think he doesnt know what he has exactly. here are the specs: MacBook Pro "Core i7" 2.6 15" Mid-2012, 2.6GHZ, 8gb Ram,NVIDIA GeForce GT 650M with 1GB of GDDR5 memory and automatic graphics switching. Its a very fast computer and it has Yosemite. What do you guys thing? i was planning on purchasing a mac but for this price....would like to know your opinions.