I agree with xblackknightx on pricing. I don't think the price is way out line for a very nice low play example. Fun factor and humor is there on this game too so it is one that will continue to rise over time as more people discover this game. Chances are you won't lose any money buying a very nice example plus you get to enjoy a very nice example Day 1.
As other other posters said, it very hard to find these fully functional and cosmetically nice at this point in time. Shaker motor vibration probably has something to do with the electronic failures. Many of these have fish wear or other Playfield issues that greatly subtract from the value. It is definitely possible to find a cheaper one eventually, but expect to deal with some issues or wear in noticeable areas.