Quoted from PinMonk:Even the CGC and Jersey Jack ones (which are the most expensive) are only $149.
I think at the 149 level, the game would need to earn $300 to pay for it, after location split. Probly what Black knight meant.
I think a shaker is great for casual players as well, they DO notice it, and might play a couple more games trying to get the game to shake more.