I chanced across this place the first time I visited the Junction, and now I make sure I stop in every time I'm in the neighbourhood.
Given the semi-limited space is shared with records, CDs, and DVDs, the selection of used books is much more filtered and well-organized than your average used bookstore. If you're looking for classic and contemporary literature for good prices, and without having to sift through mounds of junk books, this is THE place to go.
Vinyl and CD selection is pretty diverse and generally well-priced, with quite a few gems to be found. DVD selection is small and oddly expensive ($10+ for used, generic DVDs seems odd in the year 2011), but I doubt too many people come for the DVDs anyway.
The whole place has a pleasantly quaint feel to it, and the owner is super friendly; this is probably one of my favourite places to visit in the Junction.