Thread: Nutaku Puzzles

So Nutaku made some sorta puzzle system to let players get a bit of free gold. The link's on the right of their main page and all of the missions are pretty simple to do. My only question is for the last one of make an item purchase. Does anyone know if there's anything to buy in any of their games that costs less then 100 gold?

Edit - Looks like you can buy an hourglass for 15 gold on GK if anyone is looking for something to buy.