Carruades '67 ? Any ideas?

[troutbum]

As a nearly novice wine chick at the new bottle shop in town, I run to the experts for guidance, please. A customer (non drinker) brought in an inherited albeit well kept Carruades de Ch. Lafite Rothschild 1967 last week wondering it's value. ( I could see visions of dollar signs dancing in his head ala "Antiques Road Show"). Tried wine-searcher to no avail. Was able to tell him it was the second label of Lafite and that '67 was a mediocre year for Bordeaux. Will tell him also of the difficulty with a single bottle. Could someone please help me give him an estimate of the bottle's approx. value? I appreciate your help and expertise. Tbum