Yes, the PDC use the Unicorn Eclipse Pro dart board, it has razor thin wires so it increases the size of doubles and trebles, but only marginally. The BDO use the Winmau Blade III, it has thicker...
About £4000 for a really good one....
It Depends How Many. A 20pk at toysrus is 5.99. a 36pk is 9.99 and a 100pk plus a ammo box is 34.99
7ft 9 1/4
For a score to count, the tip of the dart must be touching the dart board.