I think collector sets mean the most to the first owner, and their importance goes down with each subsequent owner. Eventually, they end-up at a collector that simply wants to fill a spot in a group of similar collector sets.
Am I correct that a populated dealer display with all the proper year and material knives would actually be worth considerably more than a collector set?
"The Luggage had a straightforward way of dealing with things between it and its intended destination: it ignored them." -Terry Pratchett