There have been several limited editions of the Masters series, and depending on their scarcity these command some of the highest prices for any of Casio watches. The Men in Black and Men in Yellow series are black and yellow versions of the Masters and typically command anywhere between two and three times the resale value of the regular versions. Some models such as the "Brazilian" Frogman and A.R.T.P.I Wademan are even scarcer and can command even higher prices, though their value is hard to predict as there are limited numbers and the price is largely determined by demand from individual collectors.