Can anyone recommend an inexpensive surface mount crystal to drive a
PIC16F84? I've been prowling the digikey catalog, but not only is there a
bewildering variety of crystals, but they seem a bit pricey to me.

On the other hand, is there any problem with using a ceramic oscillator
in a commercial product? The 0.5% accuracy is good enough for serial
communications, and it sure seems like they're a lot cheaper, plus of
course they don't require any external components. Are there aging issues?

Thanks for any advice/recommendations.

Dave Johnson