The best place to enquire is the Mandolin Cafe - you'll find a typical answer here - http://www.mandolincafe.com/forum/showthread.php?73838-Gibson-Banjo-Mandolin&highlight=gibson+banjo - Whilst Gibson instruments in general command relatively high prices, you shouldn't necessarily expect this to apply to their mandolin banjos, particularly ones with warped necks which would cost a considerable amount to put into playable condition.