How much are these Yu-Gi-Oh! cards worth?

Pretty much all of them are worthless. Thunder Dragon is the only one worth anything at all, it's a few bucks but nobody will really want it. You have some useful cards in there such as Dark Hole, Monster Reborn, Sangan, and Scapegoat, but they're worth pretty much nothing. The whole lot could sell for maybe $10. Not much. And next time, ONLY type out the holos/rares (shiny cards). Those are the only cards likely to be worth anything significant.