[Exhibitman]

I don't think we can group the Bond Bread Jackie portrait as a herd thing. i believe that the impetus for that card's rise was the research recently published that demonstrated it was a true rookie card. At that point a lot of collectors realized that a fairly difficult and somewhat obscure card was a very attractive rookie card of a major historical figure. Kinda like what happened when the evidence was arrayed that photo-matched Joe Jackson into a T202 action image.

Now, in terms of postcards and Exhibit cards, people are waking up to the fact that attractive career-contemporary cards of the greats can be had for a fraction of the price of T or R cards, even now when there has been some price rise.