Teddy Ruxpin was not a '90s toy. He came out in 1985, and also isn't selling anywhere for $500. While Teddy Ruxpin was created in the 80s, he was most certainly still around in the 90s (manufactured by Hasbro). And while he doesn't sell for $500, this price was suggested by a child, who desperately wanted him.
Han refers to the fish as a 'Royal Blue Tang fish', which is slightly incorrect. They're called Regal Blue Tang fishes.