I think like a lot of us. The site and the way we use it has evolved.
1. Was only using it to find cards I did not have on my excel file.
2. Why not list them here instead of an excel file. I find out I need both.
3. If I had my collection here, why not my wants. As I added them, I seen members having them FS/FT why not trade. I also can point other people to this site for my list of wants instead of having to keep making and changing other lists.
4. If I was wanting to trade/sell, I need to add card to my FS/FT. Again pointing to this site for my FS/FT list when I'm on other trading sites. No more lists for each site/person.
5. The only thing I have not done is add all the cards I have FS/FT to the site. They are mainly commons of the "Junk era" which members here do want. There are only a couple of 100 cards here that I need, and I have 1000s of cards listed now on my FS/FT. I do add some now and then just to get more out there for sale/trade.
NO!! I did not do this overnight it takes months but IMO it was worth it. Not only in trading/selling but the members and the knowledge I have gotten for the site. Even if your collecting is narrow like mine. There is a lot to learn about card collecting.