Sounds like a misguided collector to me. Buying multiples of the same thing, especially the more common ones, seldom turns out to be a good investment. He would have better off to collect 602s, but even they have dropped in price the last few years.
Reminds me of a local guy that decided (several years ago) that pennies would soon go out of circulation and become more valuable. He was paying 2 cents each, and those of us who knew about it went to the banks repeatedly and bought all we could to sell to the guy. Supposedly, he buried 55 gallon drums full of them in his back yard. Sure would like to see him today to ask how that worked out.