Put Players Avatar ON Dummy and sell Themen Script explanation

Hello Devs,
I have want to Change the Script in this bundle, ore whatever it is named (IT sells the Outfit, which is in the model), so the Player can Claim it, and Put their Outfit on this Dummy, so they can sell it to other Players. I have good AS no experience in Scripting. Could you please Help/teach me, how i can make such a system?

The model:

I am Happy about any Help, thankyou!

You can use :GetHumanoidDescriptionFromUserId() to get a players outfit and then apply it to a dummy via :ApplyDescription()