It would be cool to have a binder of all official ac cards, but that's a tough ride $ wise.
There were official binders released for series 1-4 back when Happy Home Designer launched, but were sold in Europe only, and are now hard to find. What's cool about them is that there are separate pages behind the clear slot pages with full-size pictures of every card, but with the character blanked out to represent still needing to obtain their card. Each binder is also color-coded depending on the series, and has some unique HHD art on the inside hardcover page. I was lucky enough to get all four binders before amiibo functionality was announced for New Horizons, as I had a strong feeling that the functionality would return. I bought two of the binders on Amazon (when they were for sale by 3rd party sellers) and the other two on eBay, before they became hard to find.
I actually obtained most of my cards through eBay in early 2019 before that announcement. After that, everyone started buying cards again, and prices rose. I wish I could've bought packs at the store when those cards first came out; I love the mystery of seeing who I could get. I took a long break from Animal Crossing after playing City Folk (basically all of my middle and high school years), and didn't start playing New Leaf until after graduating in late 2018 after watching a 40-part playthrough by one of my favorite streamers. Between the period of me starting NL and the NH amiibo announcement, most of the amiibo stuff wasn't worth a whole lot, even though packs were no longer being sold physically in stores by then.
An official HHD binder was released in the US, but it's just a generic "fit any card in it" type of binder with official Animal Crossing designs. What's cool, though, was that I was able to fit the entirety of Series 5, RV, and Sanrio in it. I have to share four slots, but it's no big deal. This dumb amiibo collection surprisingly became one of my most prized collections other than silver coins, but for emotional reasons.
It really annoys me how everytime whenever I get a random visitor at the Campsite its a villager who I already seen already.
I have yet to find a villager I've encountered at the site previously. Around when my 12th visitor or so showed up, I started "archiving" my visitors by screenshotting them in the tent. So far, I've archived 76 villagers.
I take this game too seriously lol