Re: Yanagisawa or Mark VI
"sterling silver plating"
I don't think you can plate something with sterling. I belive it's just plain fine silver. (I could be wrong)
as for spending 9K on a horn...
You're in high school, not a professional. Spend that money on something fun, like a car or something that could get you women. (and don't tell me that a 9k sax will get you women)
However, go for it if you're parents are making 6 figures and spoil you rotten. Reminds me of a kid I knew though friends. His parents got him a Mercedes of HIS CHOICE for his 18th bday. Or another friend of a friend who was having a problem deciding which BMW to get. I mean that's a tough choice to put on an 18 year old.
as for me, and what I would do with 9k for a sax. I would spend about 2k of that on some vintage thing, then spend the rest on this motorcycle I want to get. That or I would buy some art stuff that I need for my other hobby. Seriously, I don't (and you don't) need a sax like that laying around. Just think of how you would feel when you put the first dent in it...