Which amount is okay for a birthday gift?

I wrote wishlists for my upcoming birthday, but I'm not sure which items I will actually ask for from my parents. I estimated the prices and it's a bit lower than what I got last year. So I think it'll be fine. I will not however ask for the violin I want to have and also not for them to pay for my next trip to Vienna.
Which amount is okay for a birthday gift?
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