Fat Goblin Games has marked its selection of Old School / Labyrinth Lord releases down to a buck each for the next 24 hours.
Now, while I do not have experience with the Bestiarum Vocabulum series of releases, I do own both Basilisk Goggles & Wishing Wells and Sinister Serpents: New Forms of Dragonkind. They are amazing values at full price, let alone a buck.
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! ;)