> A few cents, as far as I understand, but that's not the only problem Nitpick: looking on Digi-Key, in quantity, a sub-ppm oscillator is ~5x more expensive th

> A few cents, as far as I understand, but that's not the only problem Nitpick: looking on Digi-Key, in quantity, a sub-ppm oscillator is ~5x more expensive than a 10 ppm crystal -- ~85 cents for the cheapest TCXO I can find vs. ~18 cents for a crystal. The frequencies are also much higher (tens of megahertz), which won't help with the power consumption. You're right about the power consumption, though.