Holster values

[Walt NW]

Having finally gotten a reasonable idea of the values of various model Lugers to carry around in my head while tire kicking at local gun shows, I still can make little sense in the pricing that holsters are being offered, and apparently being purchased, at these shows or on the various sites on the web. Are certain manufacturers, models or dates condered more desirable then others, condition being equal, and if so, would appreciate any info on those that would be considered to have the greater collector value.