I have that set as well. I rarely see anything about it but what I can tell you is not long after I got mine in the early 90s, I checked Goldmine magazine and the box alone someone was asking $250 USD for. I never saw anyone mention having all the discs at that time but individual copies of the discs were going for up to $50 each. I've not researched it in years since I don't ever plan on selling mine