concert vault---any impressions?

Wolfgangs is great. Curious about their format, though. Why are only some shows available for purchase?

Here is another "concert vault" site that is well worth checking out. Bit of a different format; only certain shows are available for download at any given time, but the shows are usually excellent, tracked, and artwork is also down-loadable. They will also provide a link for archived shows that are not currently available for download upon request:

www.bigozine3.com/rarities/

Wolgang's is a well known website. A high school classmate of mine is the owner...he had the fore sight to buy up all the vintage items impresario Bill Graham had accumulated and this has made him wealthy. Wish he had asked me to invest.
Larry

Here's another one for you:

http://www.archive.org