How much can the product itself cost? You think the brand value is reasonable. If you think it is unreasonable, don't buy it.
Lawyers, too, pay attention to their fame, identity and so on. But fame, identity, really win? Can't you win by inviting someone else? Not necessarily!
See if it's worth it. If you think it's worthwhile and reasonable, if you don't think it's worthwhile, hire someone else.