How useful!
I have some unopened packs of... can't remember what... 2005 maybe? on there. When I get to my junk flood zone 88-91 Fleer packs they will go in there too...
But you are saying, if I wanted to (I don't currently) sell my recently completed hand collated 1993 Topps baseball set, or a trader lot I'm not willing to break up, that's the way to do it... so long as I am clearly not misrepresenting the "unopenedness" by adding a note in comments?
As I recall, it is a pure text setup, yes? No pick lists like the standard collections everyone uses. Meaning no automation on card counts at trading... still acceptable and useful.