reason for selling? same age as mine.. it's just bad, the price depreciation is somehow giving me a heartache anyways, first to consider is the state of the unit... scratches etc. if the unit is still at its super condition.. 68-70k is not bad
i suggest you keep the macbook dude. nothing beats being portable! maybe it would be better if you just buy an Apple Cinema display. i would think that that would be a win-win solution for you. but in case your heart is set on selling it already, gimme a shout out ok! joke! pero half meant yun! hehe! good luck!