I bought around 400 CDs last year, about 2/3 of them used at the thrift store for $1-$3.
I had some great finds that way
Wilco - AM first Wilco album I've owned and I was pleasantly surprised
Drive by Truckers - A Blessing and a Curse
Sixpence Non The Richer - Divine Discontent
Sister Hazel - Fortress
Blues Traveler - Four
Jade Warrior - Waves (LP)
King Sunny Ade - Juju Music
Doves - The Last Broadcast
Marin Marais: Pieces de viole du quatrieme livre, 1717 (Suitte d'un gout etranger)
Maurice Andre - Trumpet and Organ Works
Sun Volt - Okemah and the Melody of Riot
The Orb's Adventures Beyond the Ultraworld
Supergrass - Road to Rouen
Eliot Fisk - Rocheberg Caprice Variations
Duffy - Rockferry
Si Soy Llanero: Joropo Music from the Orinoco Plains
The Stone Roses
Of the albums I bought either online or at a B&M store
Miles Davis - Aura one of my favorite Miles Davis albums now
Jacques Loussier Plays Bach - The 50th Anniversary Recording
Kaki King - Until We Felt Red
These are just the ones that pleasantly surprised me. I also got a lot of albums, both new and used, that I new when I got them that they were very good.