There's something that bothers about any game which his the possibility of doing the pricing perfectly and still winning nothing, without any consolation prize or chance to bail out. If I recall correctly, there are now three games on the entire show that offer that possibility: Joker (4 out of 5 chance of winning), Plinko (I don't knotw what the chance of getting five zeroes is, but I'd bet that it's pretty low), and Half Off (50% chance of winning.) Spelling Bee and Pass the Buck offer a chance to quit while you're ahead, as does Let 'Em Roll, which also has a minimum. Hole In One offers a $500 bonus for perfect pricing.
It feels to me like there ought to be some reward for doing the pricing perfectly. What came to mind, instead of giving a straight bonus or offering a guaranteed payout, would be to have 14 empty boxes, one box with $10,000, and one with a compalitively small amount (say $1,000). If you get all three small prizes right, you can't finish with less than the smaller payout. If you don't, you have at least a 50% chance of winning nothing. Although I worry about adding any more complexity to the rules.