Parents and grandparents who got a kick out of casual fun like Wii Sports should definitely add this one to their collection. The Price is Right is something people have all watched at one time or another, so it gives them all something to relate with. If anyone won't find as much enjoyment in the game it will be the younger single child players, because they may not have a realistic idea of the value of the prizes they are bidding on.
The price is not quite right at $40, but 411 would pick it up for $30 (sorry, they know that was a cheesy sentence). Either way, if you want to make it a family night, the Price is Right is a great way to spend the evening.