In Volume 2, Budd says that "here in El Paso, it got me $250" when talking to Bill about his Hanzo sword. Later when Elle is telling Bill where Kiddo is buried, she says it's in California. Is this a mistake or did I miss something?

He doesn't say "Here in El Paso." He just says "In El Paso."

Yep, plus Budd's license plate is from California.

And he never actually sold the sword.

I knew he never sold the sword. I just watched parts again and I see where he said in El Paso. Stupid me .