Oh I feel that one, @lucas63 is right about the spec date but the real story here is the time warp. I had a job last year where I found a ziptie I left on a pipe in 2017, same lube residue and everything. That coffee stain is basically part of the ceiling now, like a hidden time capsule. My trick for those repeat spots is to take a picture of the ceiling grid with my phone before I leave, saves me from second guessing every visit. Some buildings just have a way of holding onto your mistakes like that, you know?

Man I felt that "without even trying" part hard. I started grabbing random issues at garage sales a few years back and before I knew it I had like 150 floppies just sitting in a closet. It sneaks up on you for real. The best part is when you find a hidden gem in a dollar bin that turns out to be worth way more than you paid. Feels like cheating almost. Keep digging through those flea markets, that's where the real score is.