Troop market

We have been thinking about a market made for trading troops for gold and elixir. So what we were thinking was people could only trade with other people with a town hall 1 level apart from each other. The troops one would buy would go to his army camp. I'm hoping other people can sort out the details.
Btw this isn't just my idea it's my friend's idea too

Good idea but sc will never allow that.

You would be abole to get too OP troops and you could trade 1 archer with 200 with a clan mate woth shield... Won't happen