I used to talk to Rosen at shows and over the phone in the mid-'80s; sometimes he was very pleasant, sometimes less so. At the time I collected mostly Topps test issues, and he helped me cross quite a few toughies off my want list.

Rosen seemed to me to have a small network of backers and silent partners, and in my dealings with him he mostly played the role of broker. I would tell him what I wanted, he would track it down, I would give him a check, and then I would receive my cards in the mail from someone else (most frequently Brian Morris).