Via Amazon; I just purchased the giant 2 hardcover slipcase edition of The Temple of Elemental Evil for 5E, by Goodman Games, on a Cyber Monday deal, for $28.99 Please realize that this includes reprints of the original modules for 1st Edition AD&D, and 5th Edition D&D conversions. Everything needed to run the previous module The Village of Hommlet, and the following module The Temple of Elemental Evil; for both 1st Edition, and 5th Edition. And I own both systems. Great classic modules, for a steal of a deal.
Last year I thought hard about it, at $75. For $28.99 I just had to buy it this year. An unbelievable price.