Sonic Boom is a great retro Used CD & DVD store.
I believe they sell vinyl too. It's great how they let you sample and preview CDs. It reminds me of once great record shops in NYC.
They do buy used media, although for not that great of a price. I recently sold about 9 DVD for a grand total of $16. I have no use for such discs, so gladly took the cash.
Ladies and gentlemen, I have bad news to report that the current landlord for Sonic Boom is not allowing the store to renew its lease. Therefore, they are relocating to inside Honest Ed's.
http://www.theglobeandmail.com/news/national/toronto/sonic-boom-move-shocks-annex/article2067925/