I'll second Mandolin Brothers. That's where my husband got his very nice 1919 Gibson A. A mind-bending selection of mandolins and guitars, and best of all, they are very relaxed about letting you try before you buy. Prices are on the high side of competitive, but the selection is so wide, and the opportunity to compare instruments is priceless. Let's face it, even though instruments of the same make, model and age are supposed to sound alike, they don't. Each one has its individual voice, and it's great to be able to pick out the one that makes your own heart sing.

Usual disclaimers apply -- no financial ties, just a happy customer.