Peter from piparum found the Lords of the Realm, an old game that he did like a lot, and he decided to give it another go. But during the game, you need to buy and sell stuff, and to set the amount, you click on a button, once per item. Probably you see where the problem is when you want to sell for example 1000 items. So, he made a small, simple and effective "auto-fire" button that he mounted on his mouse. Visit his page for more info.