My daughter is a freshman in college & a music ed major. Last year I bought her a Yani tenor & later a Keilwerth alto. Paid over $3500 for each of them. Even though the tenor is her preferred horn, she's been asked to play alto in the college jazz ensemble. Here's the issue... she picked up her roommate's vintage Conn alto & fell in love with it. Now she's looking to trade (down?) to the Conn which I'm not too thrilled about. My question is... since the Keilwerth is practically brand new, would it make sense to trade the Keilwerth & look for a vintage Conn? I've seen prices online for the Conn - about $1800. If that's true I could trade the Keilwerth for the Conn & still have money left over to but her a soprano - or not? What are the advantages/disadvantages in purchasing vintage horns?