"A card you bought in person and the story behind it."
When I started getting interested in collecting baseball cards, I'd look up books in library - one book I stumbled upon mentioned something about collectors saying that the Armas rookie card had good potential.
At some point, I managed to get to a baseball card shop and said I wanted an Armas - I don't know if I was amazed, but I might have thought it was neat where the person I was talking to might have gone to the store's storage room and came back with the card I'd asked for.
I think he looked in a price guide and let me have the card for about a dollar - I didn't know what I did with the card after the fact, it was probably thrown away at some point, though I got another years later and sent it to Kemp for a through the mail autograph.
Looking back, the book I read was printed in 1983 and by the time I got the investment tip - the playing careers of the guys pictured had played out.