Vintage and used flutes purchased from Weissman Music are guaranteed for their authenticity as true Vintage and certified by our team of highly revered flute experts headed by Vintage flute expert and company founder, Jeffrey Weissman. Each flute receives an in-depth custom prepping unprecedented in the flute industry for its excellence and integrity and is guaranteed to bring the instrument to its optimal playing quality. The purchase of a Vintage or used instrument receives the same Weissman Warranty that comes with the purchase of new flutes. All instruments are covered under warranty for six months from date of purchase. All repairs are covered except those resulting from abuse, accident, neglect or rust.