[galangalalgol]

Compensating for the temperature will never be as accurate as actually controlling it (O is for ovenized). I keep reading about chip scale atomic clocks coming down in price but I've yet to see them as the oscillator in anything mass produced.

[rasz]

When 2G started being decommissioned ebay was suddenly flooded with super cheap rubidium frequency standards from parted out base stations.

[jacquesm]

I'd love to have some.

[jnd-cz]

Also cheap OCXOs.