Do you mean a full-size crossbuck? Hard to tell as the demand for these kind of things doesn't seem to be very high. There are only two listed e-bay and, although they are sound more modern than the one you have, they are also attracting no bids. I guess listing it on e-bay would be best way to find out. Also, be prepared to show how you obtained this sign legally as you'll be asked to provide proof by e-bay.
