obsessed with muggle items? must be a weasly. Harry Potter Meets Little Mermaid. My Two Favorites! Wait this explains everything what if the weasleys are related to a mermaid look at how many daughters triton had?
Why would Hades sell Cerberus?<--- because after the Hercules incident, and then again with Percy Jackson, he decided that maybe a giant, three headed hellhound wasn't as reliable a guard dog as he thought.