$50. Most definitely. The hours and hours I would get out of it = for sure. I can blow that sort of money on many things for one night and have nothing to show in the morning.
I also will pay that for each of the core books and do NOT want them crammed into one book. Invariably all these books that have a whole game in one don't have everything you need. DnD certainly couldn't do that if going for all previous classes, races etc. Plus, i like the info in diff books.
If they go that way, so many will complain about everything that is missing.
A discount on purchasing 3 as a bundle should be offered though. But either way, i will be buying them before all are available.