Ola Amazon sellers...There are some here....
I have found 2 things that you could sell like hot cake...
1. Find something that prevents car doors from being slammed....Uber drivers will love it. There are about 3 million uber drivers in USA..
2. RFID protected wallet. This one seems to be selling for $15 to $25 on amazon...and isn't all it is, is just a piece of aluminum? May be you can continue to sell this thing...coz more and more people will buy the stuff...as they don't want their wallet RFIDed and hacked while they are walking in downtown or malls etc..