The original demo tape release on Werwolf Productions is one of the few early Hrossharsgrani releases Nazgul managed to find on the open market. This was bought on eBay about 5 years ago, and I've never seen another one for sale since!
9. Der Pfad Zum Tor Der Toten
200 copies of this CDr demo from 1999 were pressed, but you'll be doing very well to find one now. There were also 33 copies on tape format with an additional 3 bonus tracks, and Nazgul has yet to track one of those down. If you have one you want to trade, you know where to come...
8. Rehearsal CD1
Frankly this is where it gets pretty hard to distinguish in rarity value between the subsequent Hrossharsgrani releases, as the majority from here were directly from Alex rather than bought online or from traders. The releases are just so hard to find, anything from pre-2000 is pretty much impossible to find now. This rehearsal demo being a good example!
A very hard-to-find demo from (you guessed it) 1999, in an edition of just 30 copies. Many of these tracks also ended up on the "Blut" demo.