I agree with Dean that the market is likely to be very limited. Most teams that buy a Calfee have pretty much sorted out what they want by that point and are likely to hang onto it.
Until there's something else out there as the new best thing, you're pretty much waiting for existing Calfee owners to head to the nursing home.
So if you find one, great, but I think finding a used Calfee that fits, has the equipment you want, at a good price is a long shot.
And then you're buying a used CF that you don't know how it's been treated.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.