Three sets of D'Addario flat mandolin strings. These are the standard phosphor bronze medium gauge strings for bluegrass, used by many professional musicians. I purchased these new at a musical instrument store and have kept them stored at home. The packaging has some surface tears from removing price tags, but the contents are new and unopened. They have been stored for a long time, but since D'Addario uses sealed packaging, I don't think the contents have deteriorated. They are 500 yen per set, including shipping. Instrument strings, like instruments themselves, have been increasing in price in recent years, so I think this is a good deal. No claims and no returns, please.