How to catalog yugioh cards?

There's really nothing to catalog the with, other than a spreadsheet.

What I'd do is buy a binder with card sleeve pages and just organize the rare ones how you'd like. Anything common/non-holographic is usually worthless, but you can just group them into stacks.

If you're cataloging them for quick-search on your pc, only spreadsheets are available for what you need.

Yugioh Card Catalog

Prices for cards are usually divided into two catagories, what its worth and its realistic cost. What its worth is usually a representation of what collectors have payed for your particular copy of the card or what the average price normally is. The realistic cost takes into consideration things like supply and demand and what the average person is willing to pay for it. Amazon is the best place to check what the realistic cost is and more than likely you can half to three-fourths of that depending on how nice your local card shop is. It's going to vary on region so just because the internet may say that you can sell it for 20 bucks doesn't mean someone in your area is going to buy it for that much or even at all. EBay is a good alternative to this. Hope this helps a little bit!

A wikia entry I guess

I don't believe this to be correct