i used mr.crayfish's redstone vender and made dozens of them for others to enjoy. have fun with itu, customize it set it as a server world whatever. share it with anyone or anywhere, but please send people back to here so they can make their own vending machines custom.some have dyes, almost all others are ready and blank for trading.
here's how they work and where i found them: https://www.youtube.com/watch?v=7JYzvKaHQlE 
*(Thanks to MR.Crayfish for making this video that inspired my build)* 
-all venders are 1 for 1 trades only-