Heck, even WotC has a PDF bundle - The Yawning Portal - that includes four AD&D 1e classic adventures - C1 The Hidden Shrine of Tamoachan (1e) - G1-3 Against the Giants (1e) - S1 Tomb of Horrors (1e) - S2 White Plume Mountain (1e) (as well as two 3e and one 5e release) at a nearly 60% discount - 20 bucks.
The sale lasts for 12 more days, so I'll be going through it will a fine comb and highlighting some OSR releases that shouldn't be missed.
Remember, all purchases using The Tavern's OBS affiliate links puts 5% of your purchase price into The Tavern's coffers. Don't leave that money on the table for the greedy corps! Tip your barman! ;)
The Minotaur for Old-School Essentials
*Requirements:* Minimum STR 9, Minimum CON 9
*Prime Requisite:* STR and CON
*Hit Dice:* 1d10
*Maximum Level:* 8
*Armor:* Leather, including shield...