Yes, a photo would be nice.
If this Ophir sensor is in good condition and is calibrated fairly close, as is suggested, than this is a great deal IMO! :yh:
These don't come around very often anymore, and when they do, are usually much more expensive than what you are asking!
Good luck with your sale!
Edit: I just noticed that the OP posted this over 16hrs ago, and no real bites yet, usually when a 20C-A -1-Y comes around at a good price, there is all kinds of attention.