Re: Lost toy at sitter's house, advice?
Yeah. I'm thinking go buy him another one and don't let him leave the house with it again.
Unless you live with this woman, I don't really think it's a fair call for you to say things like, "She's uninterested in helping you find it," because you simply don't know that. She may have torn her house apart looking for this toy. Unlikely, but possible. Lesson learned, don't let him leave the house with expensive toys again.