I wish every member did, because I think it's facinating to see the stats for how many cards are listed in collections here. But, I think I understand why they don't, because it takes plenty of time to input a large collection accurately.
I found the site in June 2020 when I ended a long hiatus from card collecting. I took out all of my cards out of my home office closet and spread out boxes, albums and loose cards in the guest room. One way or another, I was going to figure out whether I should sell off my collection, keep it, or keep it and continue to collect. Either way, everything should be catalogued. Looking online for cataloguing help, I found one site, but it didn't list everything I had, so I searched again and found this terrific site.
It took plenty of work over several weekends to get all of my collection listed and double-checked. At times, it was a bit tedious, but it was good for me to lay my hands on every single card I owned. It rejuvenated my love of the hobby. I've kept my all of my old cards and begun adding lots of modern cards, too.
The guest room is clear, but visitors do think it's pretty cool to see albums and card boxes on a couple of new bookcases along one side of the wall. There's only one rule: if you want to look, that's fine, but please let me pull out anything you want to see and handle it for you. (The really valuable old cards are locked in my home office.)
I love to trade! Check the top couple of paragraphs of my profile to see my general trading desires. If you're uncertain if I’ll take a certain trade, message me and we can figure out something.