Last summer, while walking around my neighborhood, I found this intriguing little notepad, half its sheets missing, on the sidewalk next to a trashcan. Picked it up and loved the paper quality. Thin and a yellowed gray color like old pulp novels.

Used them for everything and finally, a couple days ago, exhausted my supply, so went online and found them ("Recycled Paper Memo Pad"), sold direct from Muji for $1.61 🤯 a piece! I bought five, so should be good for awhile...