Yu-Gi-Oh cards worth?

I have a deck of like 600 cards, probably a bit more than that. I know they're not really worth tons, maybe I could get like 30 bucks maybe 40 for the deck. My main question was about 3 cards I have. I have all 3 of the egyptian god cards (the original ones, not the new ones) and they are pretty much in mint condition. No scratches or anything like that. They are holographic with shiny gold lettering. Does anyone know how much these would be worth now? They must be at least 3 to 4 years old minimum.