Look at it this way, pay $1.99 for the app, then while out one day shopping your wife or girlfriend wants to stop in Victoria"s Secret. You do your man duty and helpfully give your input as to what is nice, then she goes to try a few things on. She likely won't be popping out to see what you think so you grab your phone and open the app, then hit the Sunglass Exchange section and get a sweet deal on a pair a shades you've either been looking for forever or save half the price. That $1.99 just payed for itself. For instance last week bought a pair of X-Squared carbon polarized with spare ruby lenses off another member for $200, another member chimed in after and said "missed those by a half hour", maybe if he had a mobile app and paid $1.99 he would have got those before me.