Need Advice: Looking to buy a 18K GMT II-C Rolex

[isolentmink]

Hi, wanted to know if I could get some feedback from fellow Rolex/watch collectors. I am considering buying a GMT II-C Rolex in solid 18K with a black or green face. My two questions are:

1). Am I getting a good deal at $14,800 for a watch with box and papers?

2.) What color is preferred? Is the green "anniversary" edition more desirable and valuable?

Thanks for all your help!