I don't think that anyone in their right mind would ever tell you that you are an idiot for NOT paying $500-700 for a pair of sunglass frames that outside of our unique, parallel universe are virtually worthless. Not when $500-700 has tremendous value outside this universe. No, I think ya done good!
Good point. Most people I know think $100 for sunglasses is crazy. $500 for a used pair? My coworkers have learned to stop asking how much they cost.