Minecraft Items Buy / Sell Bot?

I'm looking for a bot that sells items to a player or buys items.

The customer should transfer a certain amount of money to the "bot". The "bot" should drop the associated item. When buying, the customer should drop the items and the "bot" should give these counts and the associated amount of money to the customer.

Which mode or server is it?

To Citybuild, working with Essentials, I'm not the owner of the server

Villagers spawn!

You can set it up so that it sells certain items for other items

Shopkeeper plugin

But he's not owner Leude

He is not the owner. He's looking for a client side bot

Thank you

You can't program, can you?

To code something yourself is actually very easy. If you "can" Java, it's done very quickly

Yes, but I only read the question through alda. That it is not owner is in a comment from another answer and I did not read that.