So what should the selling price be?

As a starting point, you can check Mac2Sell, eBay (including completed sales), or Amazon for prices of similar models, to get an idea of what a reasonable price may be. Then adjust the price to account for condition, configuration, remaining AppleCare coverage (if any), etc.

I would say....

$1800-1950 tops. Remaining AppeCare helps in the price, but also helps good care of the machine and no cosmetic/functional issues.

If selling through an online site, factor in shipping costs/fees