A Hymn To The Ancient Souls seems pretty demo heavy. I'm picking that up. If I really dig it, I'll get the other collections sooner or later.
I'm getting these by local delivery from the former Metal Haven store. If anyone wants me to forward them a list of vinyls he has for sale via mail order, PM me. He's a completely trustworthy seller, and there are some real goodies there. Expect higher prices for some rarities, but there are quite a few good finds at $25 and under. Good stuff that lingered after the store closed has a good price.