amplify central fretboard mastery guitar flash cards, 80 cards, large 4x6 format | learn music theory, notes, chords, scales & modes - for students & teachers - gift for guitar players - premium quality is up for auction in Musical Instruments. The current bid is $1.00, 97% below the $34.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.