A script that is compatible with TamperMonkey(Google Chrome) that displays the lowest listed marketprice value of the item upon clicking a single button on the page

Hi, I've created several Chrome Extensions, and even more userscripts (what you're asking for), but I'm not entirely sure what you want this one to do. What do you mean by "for all items with any shop"? I've already visited the website, so I know you mean items on that site, but I need more information.