Gemm
Gemm
http://www.gemm.com/c/search.pl?field=artist+or+title&wild=katie+melua
MusicStack
Buy rare cds, out-of-print vinyl records and hard to find lps and music albums from thousands of record stores.
http://www.musicstack.com/
Netsoundsmusic
Searchable catalogue for rare, new, imports and collectable records, cds and used music
http://www.netsoundsmusic.com/search.html