Making own shops?

[cdapuppie]

So not that DeeKay's shops suck or anything, its just that I want to make my own Trading system so one person can put a item in a chest and then someone takes the items and places some of their other items in the chest and then the first person that put stuff in will get different stuff back. And also, I want to sell diamond, redstone, netherrack, and iron just for a little bit more cheap then what it is in DeeKay's shops. So, am I aloud to do this. I've seen lots of people doing this already on the server so I assume that I am aloud... right? 

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skydoesminecraft is a boss!!!

[The_ChamPeon]

you can atempt to make sethbling's trading system with pistions and water. I couldn't find the video of it, but just a sugestion.

[DeeKay]

Yes, you can sell whatever you want however you want.

[cdapuppie]

Oh ok. Thank you. Just wanted to make sure of it. I made it into a selling store but I think I'll add some trading though late.