From what I understand, both of these two places, Play-Asia and Lik-Sang offer the best stuff. This is import-wise, though. I got Ossu! Tatakae! Ouendan from them, and it was a perfectly legit copy, so I would presume their music cds would be fine as well.http://www.play-asia.com/http://www.liksang.com/
And as for SotC:http://www.play-asia.com/paOS-13-71-8l-70-10dp.html
$24 (excluding shipping, don't know how much that'll be) isn't so bad.