Darts is a simple and fun game, but subtracting triple 17 plus 12 plus double 19 from 501 is anything but simple. Coin-operated dart boards do this for you, plus many other things. There is a vast inventory of coin-operated electronic dart boards available on eBay. They are fun to play, plus you can easily set up and run leagues. Typically they accept either soft tip or metal darts, although you can get options that handle both. You can get portable options, too. Various LCD or screen displays usually offer instructions to the players to keep the game moving, even when novices are involved. Some even have a missed target sensor so it can pick up a throw when it not only misses the dart board, but also misses the unit. Coin-operated dart boards are also programmed to play a variety of different games. This includes the traditional 501 and 301 games, but you can also play Cricket, Hi Score, and others. Some are custom-made games by the machine's manufacturer, while others are well-known favorites.