How much are yugioh cards worth?

Answer 1

Depending on the effect, the value of the card depends on how strong the card is in the meta-game.

for example, a 5 star monster like:

Vortex The Whirlwind: is less than 3 dollars.

however, in the same set, a 1 star monster like:

Maxx "C": rises to around 30-40 dollars.

so, in reality, it depends on value, and the current effect on the meta-game. also, rarity plays role in value as well.

Well that depends on the card, each cards value is based on rarity. Here they are (from cheapest to most expensive)

-Common

-Rare

-Super Rare

-Ultra Rare

-Secret Rare

-Ultimate Rare

-Parallel Rare

-Ghost Rare

If you need a key to identify these, Google something like yugioh rarity guide. Then you have a guide of which cards are worth more than others. If you need specific values, then look on eBay for a rough guide.

Answer 2

It depends what cards they are. For example if you sell Pot of Duality, it's worth a lot. If it's in unlimited edition, probably a little less. If you sell something like Ancient Gear Knight it's around 90 cents. Card prices vary massively depending on rarity and demand.