The 1990, 2000, and 2006 albums are all regular retail products from
Polydor, each one a remastered presentation of the previous edition. Most of these
pressings originated in Europe (the 2006 one from the Netherlands) but are available
worldwide for discount prices. The 1995 Polydor album was a "Mobile Fidelity Sound Lab"
Polydor product (UltraDisc II, 24 karat gold CD) that has since sold for more than $150.