Originally Posted by Captain_jovi

Gotcha, I wasn't sure if you meant it doesn't cost much to produce or to buy.

I think there are a lot of reasons Jon isn't doing this. Royalties, state of his voice, interest from the general public, cost to produce and market. Metallica have a really loyal fan base who go nuts for this stuff too. They band would need to sink serious money into marketing and getting back fans that walked away from diminished quality shows and high ticket costs.