When looking for inspiration on a creative server my friend owns, I noticed that they had heads, but not just the normal animal or mob heads. They had heads such as tiger heads, or clocks, even toasters. Now, as it was a creative server they had normal animal heads as well, but since we already have them they wouldn't need to be added. My suggestion is that we have a command such as /skull or /head to open a window, with multiple pages you can navigate with the click of a head, or maybe have separate commands for each page. Each head would cost rupees or tokens. They could cost 10r a piece, or maybe 5 tokens each. If you wanted 5 hamburgers, you would have to pay 50 rupees or 25 tokens. You would just click the hamburger 5 times, and you would get charged each click on the head. Let me know if you like the idea!