Hi Scott, welcome to the Forums!
As far as the value of the Merckx is concerned, it's hard to say. I don't recall Merckx ever making a touring model. However, I believe that the "Eddy Merckx" name had been licensed out to some other manufacturer(s), prior to Merckx opening up his own factory in 1979 or 1980. (I forget the exact date.) Regardless, putting in the miles and enjoying the ride is what's most important.
Speaking of putting in the miles and enjoying the ride, you might want to come out to the
Lancaster Bicycle Club's Covered Bridges Metric Century on August 16th. (It's in PA.) A lot of Bike Forums members show up, and it's a great time.
I hope you enjoy your time on the Forums!