I'll tell you my experience. I have an engagement ring from a previous marriage that is a solitaire, almost one carat, princess cut. Great clarity, etc. according to the appraisal document received at purchase. I have been trying for several years to sell the thing. I listed it on ebay, Craigslist, went to several pawn shops as well as independent jewelers. The only responses I got on ebay & Craigslist were scammers. No one in the jewelry business is interested in buying it. You see, diamonds are only valuable at purchase - they're not rare; the market is man-made. The person who initially buys the diamond pays way more than its true worth. The appraisal document just gives you false security; it's not worth the paper it's printed on. Well-meaning jewelers basically told me to find some poor guy who is ignorant of this and unload it on him. My conscience won't let me do that, so I guess I'm stuck with it.