I got offered $1900 (maybe $1800) for my 2012 rMBP. Specs are: 2.3ghz, 16gb ram, gtx 650m, and of course retina display. It's the older model, so I might be willing to part with it IF something comes out in the summer. Is it a good price to sell it for? It's on Craigslist btw. Thanks.