I've sold a couple of 60" cues. Properly advertised, they sell fine but it might take a little longer to sell them. There are always players out there looking for 60" cues and they are not exactly common to find.
I own 4 60" cues. My playing cue (JW with a Predator), my back up is a sneaky pete custom with a Predator set up like my playing cue, a custom Huebler, and an Auerback jump/break cue.
Chris