To be honest, I wouldn't spend $500 on this without some discussion.
I think it's a great gesture, but there are so many options, there might always be a 'better' one for sure. (Better as in, that he'd like even more)
If someone would do this for me I'd appreciate it if they gave me a $100 knife with an idea in mind, because of the effort made, and then allowed me to spend $500 on a knife I want myself or perhaps we'd both like.
I'd carry both with equal pleasure, but for different reasons. One for the idea behind it, and one for the idea behind it AND because I love the design etc.
But maybe I'm a little weird on this... Personal experience just taught me I'm almost never happy with these gifts, even though someone has made the effort and spent a relatively large sum on it.
Of course I'd like to get a Sebenza with a wood inlay as a gift for example, but it wouldn't be my first choice. And if someone else picks it for me, chances are way higher they pick one of the inlays I wouldn't choose myself as opposed to the one I would choose. So I'd end up with a nice knife, but not the knife I'd want to have, and even in a configuration I'd never pick myself. I always hate it when something like that happens, I can
feel someone thinking "I went to this trouble and spent this money, and he isn't even happy with it!!", that sucks for both of us...
This has nothing to do with me not appreciating gifts and the effort made, I'm just really picky and difficult to please, it has to be
that one for me to stop thinking there would've been better options for a significant sum spent (assuming it is in this case as well)

But like I said, maybe that is just me
