Best used record shops Boston area?


I will be passing through Boston and it has been a few years since i have visited the used record stores.How about an update on my best shots for Jazz and Classical.I know Stereo Jacks in Cambridge is pretty good for Jazz.Would be grateful for a current heads up!
jazzcourier
Got some nice stuff here

Stereo Jack's Records
www.stereojacks.com

1686 Massachusetts Ave
Cambridge, MA 02138-1868
(617) 497-9447
Record Exchange
256 Washington St
Salem, MA 01970
(978) 745-0777

Excellent selection of new and used but 45 mins outside of Boston
I shop in Cambridge - Boston area three or four times a year. I visited Stereo Jacks on Mass Ave this past August and their stock of used lps was quite low. Nowadays I usually visit Looney Tunes (very close to Berklee School of Music on the Green Line) and that's about it. Looney Tunes is a fairly large store and because of their location, they carry a wide array of new and (mostly) used lps.
You can always check out Newbury Comics on Newbury Street and in Faneuill Hall but their selection is pretty limited.