I want to list my 2011 13" Macbook Pro w/ 2.3ghz i5. I upgraded to 16gb of ram, 128gb crucial m4 ssd, and put the stock HD in w/ optibay mod (320gb). It's in perfect condition, it never left my desk and was used with an external monitor. It also has the original optical drive in the case enclosure similar to the superdrive. How much should I list it for on craigslist? Thanks for the help!