When comparing the 122 to the 126, I don't understand why the WITH transducer version for both models is the same price. Because, when you compare the same models WITHOUT transducer, the 122 is always $200 cheaper than the 126 (which I is figured is due to the lack of built-in G3 mapping on the 122). If my logic is correct, shouldn't the WITH transducer 122 be $200 less than the 126?