A haven for the area’s folk scene-pop in to learn about upcoming concerts, find a balalaika tutor, or catch the weekly “old timey” jam (M 8pm), when anyone is invited to bring an instrument and play. Sandy’s buys, sells, and repairs most stringed instruments, specializing in the “old or unusual,” so this may be the best place to go for mandolins, ukuleles, and banjos, and even the odd bodhran. The staff is unobtrusive, so ask if you have questions. New CDs can be pricey ($15+) but worth it if you are looking for local artists or compilations. Used records ($2-6) are more reasonable. The store also supports the UMass Boston’s WUMB folk radio channel, 91.9FM in Boston.