I haven't used multiple collections on this site yet, but I do on Beckett. I created one called "New Buys". That's where I add any cards when I get a re-pack product or a collection from someone else. Right now, everything in the folder is stuff I've added from the 25K+ collection I acquired in October. But I haven't added much of it there yet. It's mostly just to check on cards and keep the info a click away. When I use it for re-packaged cards bought at Target or something, I add everything in there and mark everything as keeps or traders. Then I know exactly what I pulled from the package (plus the total value of everything). Then I move everything into the correct collections. Not quite the same as here, but having that collection title really helps when I need it. I also have one called "Recently Added" where I add all cards acquired in trades. When I put the cards in albums or cases (whether it's 1, 3, 20, etc. cards), I move them to the correct locations.
NO PWE's EVER!!! PLZ PM me 1st before sending any offer. ONLY selling cards as of March 2024. No trades or purchases right now.
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Largest total PC card collections by Team, then Athlete (as of 3/22/24):
STL Cardinals (MLB) - 8810; Carolina Panthers - 2888; GB Packers - 1790+ cards
Mark Martin (NASCAR) - 2038 cards; Jimmie Johnson (NASCAR) - 1875 cards; Jeff Gordon (NASCAR) - 1594; Ricky Rudd (NASCAR) - 839; Ozzie Smith (MLB) - 707