I have to sell my deceased brother's Cartier watch - where would be the best place in Dallas to do that?

It is a Cartier Roadster extra large Chronograph, but I don't have the case and papers and am wondering if there is a decent pawn shop I can take it to and get a fair deal. I live in North Dallas.|||if you have the paper try on line Overstock or I offer, if you go to Lombard they will pay you 10% of the value