How much are about 500 Yugioh cards worth in average condition like Celtic warrior flame munipulator dark magician red eyes b.chick elemental heros things that the traditional cards?

It depends on the specific cards and their condition, as well as the current market demand. Some common Yu-Gi-Oh! cards in average condition from the early releases, like "Celtic Guardian", "Flame Manipulator", "Dark Magician", "Red-Eyes B. Dragon", "Chicks", and "Elemental HERO" cards, may only be worth a few cents to a few dollars each. However, certain valuable cards or rare variants can be worth significantly more.

To get a more accurate valuation, you can check reputable pricing sources such as reputable online marketplaces, card retailers, or price guides to see the latest values and trends for the specific cards you have. It's important to factor in the condition of the cards, considering their level of wear and tear, which can greatly influence their worth.

Remember that pricing is subject to continuous change based on current supply, demand, and market conditions.