This probably has been addressed earlier but I did search and couldn't find anything specific.
I wonder if anyone using these pages could answer a few questions re their format. I assume that se-tenant issues are provided for as attached blocks, etc. I also wonder if coils require pairs or are covered as singles? How specialized are they? Do they provide for tagged issues? Varieties on the Centennial issues?
Arpin has binder.page sets listed at a bit over $300 US for hingeless pages to 1985 in a binder with case. That seems a competitive price:
https://www.arpinphilately.com/itm/...p-album-blueNote the binder. Lighthouse has these 'Classic' binders for some countries but they are usually not available in the US.