Levykauppa Äx
http://www.recordshopx.com/index.php
Country: Finland, ships everywhere
Selection: Anything from extreme metal to obscure prog to hip-hop
Orders: ~15
Shipping: 1 day to Finland, no idea internationally
Secure: Yes
Comments: Great customer support at least in Finland, usually received answers to any questions in under 5 minutes via email, and the super-fast shipping in Finland is awesome.