Good Evening, Bighead,
Only you can decide about the appropriate price. I generally agree with the information given in the posts above. If the film had been frozen I would have virtually no hesitation about using it; even if just stored in a refridgerator, it should still be fine, especially with the adjustments available at the printing step. If I had an immediate use for 100 rolls of 120 CN film at only $1.50 per roll, I'd consider it a very good, though not fantastic, deal. All this assumes, of course, that each roll is still in its factory-sealed packaging.
Konical