I saw a 15'' retina macbook pro 2.6ghz quad core i7 8gb ram and 512gb ssd with Samsung display for $1900 on craigslist. It's only a month old, seller says they need a built in CD ROM thats why they're selling it. This sounds like a great deal, but maybe too good to be true. I've never bought a big ticket item on craigslist and was wondering if anyone has bought off of craigslist how was your experience and can you offer any advice??