the futaba gy240 can readily be found for $10-$20 more than the g90. In my opinion if you are gonna pay $90 for piezo gyro you may as well spend the extra $10-$20 for a gyro that uses far superior silicon sensor technology. Or if your budget is the concern then I would recomend trying another piezo sensor gyro with heading hold that is less than $90. I found the telebee/zoom heading hold gyro that is in my blade for $45 somewhere online. There are many cheaper priced piezo gyros out there than the g90.
I am constantly watching the wallet too. I just dont like seeing people getting taken to the cleaner for a product that carries a high price just because of the sticker on it.