[pawpawdiv9]

This is where theres 2 views-
As for collecting only- its the 52, no doubt hands down. Centerpiece for most folks.
But from your words, your looking as a investment.
No one can foretell the future. Who is to say maybe one day the 51 surpasess and gets recognized as the true RC.
The 52 is your investment egg for now, I would think.
One question is, once you complete the 51B set, what is next for collecting? Are you keeping it or selling it?
For me, I have both, graded 2. And everytime I open the safe, my eyes always go to the 52. The image alone is breath-taking over the 51.
I am not persuading you to select one way or another, it your decision and collect as you may but I would not combine collecting & investment into one.
No, I did not stay at a Holiday Inn nor am I a financial advisor.