Well, it's a personal thing in my case. I collect things because "I" value them. Knives, uncirculated coins, signed and numbered lithographs, and Burmese jade sculptures are a few of the things I have collected over the years. I didn't purchase them for the price they might bring in five, ten, or fifty years. I purchased them because they please me. Whether they're hanging on my walls, sitting on shelves, or gathering dust in a drawer, they have value to me.
If I were to offer my unused and identically numbered DR knives for sale, I'm sure that I could get more for the set than for their individual values. But, I don't care about that - they're not for sale. I will reap far greater value from these knives, in time, when I give them to my grandson and see the look of gratitude in his wide eyes.
Was this a wise investment? I think so.
P.S. I have no fears that my wife would use one of the knives on me - one of them was a gift from her. <img src="/images/graemlins/wink.gif" alt="" />