I started collecting poker card decks years ago. Back then I didn't really care about any collectible value and thus usually just bought one deck and immediatelly opened it to have a peak at the cards.
Except for (silver) coins and recently some crypto collectibles, these decks have been the only thing I used to "collect".
Often you can find an impressive display of artistry and design going into these, that's what got me interested in them in the first place (having said that I enjoy a good poker game from time to time).
In this topic I want to "show off" all of my unpoened decks which usually means I do own at least two decks (one is opened). So if you are really interested I might be willing to trade or sell (some might still be sold by normal vendors, I haven't checked).
Here are 24 decks, showing front and back:
click to view large versionClose-up of one of my all-time favourite decks "Betrayers" [nsfw]:
click to view large versionOne of the very few non-poker-deck-sized card sets I own: A black-and-white design Tarot deck:
click to view large versionclick to view large versionIf you have any unusual card decks, ideally with some great artworks or similar feel free to post here.