MUSIC FOLK
At Music Folk in St. Louis, Mo., they accept musical instruments for sale on consignment. Music Folk will advise you on whether they can sell your instrument and consult with you on setting a fair price, then they will display your item on their sales floor and may put a picture of it on their website.
Think Outside The Bin
Think Outside The Bin 
Musical instrument insurance usually covers any type of instrument that you have up to the replacement cost or an agreed upon value if the instrument is considered to be a higher value or antique.