8 track-Jan Hammer The First Seven days NEM and 50 similar items

So rare I cannot find even one copy of this for sale anywhere or even the record of one being sold, I am rather surprised how rare many of these 8 tracks are becoming, several I've listed lately there are only a few for sale and another I had that was nowhere to be found anywhere sold within 2 minutes after listing it for $61. I did find 2 mint condition Jan Hammer 8 track tapes "Miami Vice" had sold for $100. Since I can find no copy of this to help me determine the value I am just going to use my intuition and my rather educated keen sense of the market to arrive at this price, I'm sure it's worth a bit more but I'm not gonna be greedy. This tape by the way sounds extraordinarily great pertaining to it's sound quality, don't know why it stands out from the other tapes I have, maybe it was rarely played. Jan Hammer ?? The First Seven Days Nemperor Records ?? NE 432 Vinyl, LP, Album 1975 Electronic Future Jazz, Experimental, Ambient Tracklist A1 Darknesss / Earth In Search Of A Sun 4:30 A2 Light / Sun 6:40 A3 Oceans And Continents 6:14 A4 Fourth Day -- Plants And Trees 2:44 B1 The Animals 6:09 B2 Sixth Day -- The People 7:11 B3 The Seventh Day 6:08 Companies, etc. Distributed By ? Atlantic Recording Corporation Phonographic Copyright (p) ? Nemperor Records Copyright (c) ? Nemperor Records Pressed By ? Presswell Published By ? Country Eastern Music, Inc. Recorded At ? Red Gate Studio Remixed At ? Red Gate Studio Mastered At ? Atlantic Studios Credits Art Direction ? Paula Scher Composed By ? Jan Hammer Congas, Percussion ? David Earle Johnson (tracks: B1, B2) Cover, Illustration ? Milton Glaser Engineer [Assistant], Technician [Custom Audio Installations] ? Andy Topeka Management ? Nat Weiss* Mastered By ? G.P.* Piano, Electric Piano, Synthesizer [Moog, Oberheim, Freeman String, Digital Sequencer], Mellotron, Drums, Percussion ? Jan Hammer Producer, Engineer ? Jan Hammer Violin ? Steve Kindler* (tracks: A2, B1 to B3)