So we've been buying, selling and trading these sheets of painted plastic over the years (sorry Digi-Ink-n-Paint-show collectors). We wrap them in more plastic and stick them in plastic books, but before all that, we usually scan them, for archival/inventory purposes and so we can share them in cyber-space with those interested in seeing them

Personally, I like to add a background of some kind, if I am unfortunate not to get one with the cel (which 99.9% of the time

Well, that's what I did with my cel scans*, I made my own Giant Robo themed Uno deck!
*Full disclosure: I used digital scans included on a DVD for main character portraits, since those were not used in the actual anime (and I doubt I will ever see those in cel form). And I took a couple of screen grabs for the box art (I do not own those cels) The rest come from my personal collection
Finished product:

4 Special Cards:

Full 108 Deck:

Enjoy!