In our haste to neatly place things in little boxes (categorize/classify
them), let's not forget that the whole point of doing so is to make the stuff
easier to find!

When in doubt, think of the end user of your diligently compiled records.
Who's potentially going to be looking for the item, e.g. the Tarot cards?
Perhaps someone doing research on various religious / world views.  And I'm
sure there are other examples I can't think of right now.  The question should
be:  can they be found by whomever is looking for them?  (Even those who might
not know of their existance...?)  Do your records cross-reference enough
information to point any seeker to the gems hidden in your collections?

One of my mentor's often described the museum profession as "telling stories
with stuff".   Make sure you can find "that perfect thing" to tell "that great
story"!