Chris--
The lecture involves simply this: telling customers that in most cases, I don't have any way of knowing if their magazine will appreciate in value over time, so I suggest keeping it whole, not glueing it down permanently, and using all conservation materials. Unless it's something really obviously valuable, I back off at this point and let the customer decide...as many don't want the additional expense of doing conservation framing. And most are not concerned about value, but want it look nice at a decent price.
I'm guessing the magazines that you have would be considered "collectible". The way to decide is to ask yourself if you ever might decide to resell them. I'm guessing the answer is yes (you never know, given the state of social security...lol), in which case, you should keep them whole.
Galen...very nice pic of the Victorian house!
Lisa