hello,I am interested in the following products can u kindly tell me more about each of them. i am in Kenya i don't know how to differentiate the different types of rear cameras that you have, is it cheaper to buy camera separately with the monitor or do i buy the one that comes as a package i am a Kenyan startup i want quality products that are cheap so as to penetrate the market well.price is a factor hereQuantity:20 Pieces Show More