Care, handling and storage of musical recordings in a collections environment, from the US Library of Congress. Well researched and includes an extensive bibliography.
Large online music price guide, including many rare records and compact discs issued around the world. USA values in dollars; accepts submissions from users.
Online guide to UK values for records (and a few CDs), mainly by 80's and 90's artists. Calculated from average prices charged by dealers in the UK magazine "Record Collector."