Hold out your plastic pumpkin, grocery bag, or pillowcase, Skirmisher Publishing as a special treat for you. They've got their Trick or Treat II bundle going now. You can save 90% off some of their most popular PDFs for your games.
From the website:
Trick or treat! We are continuing with our tribute to the Halloween season by brewing up a new and very special, deep-discount, 90% off, customer appreciation bundle that contains our Platinum-bestselling "100 Oddities for a Creepy Old House" system-free sourcebook and 10 other titles that we have selected from across our product lines. It will only be available for a short time and we will then delete and reconfigure it with different items, so if you see something you like you need to grab it while you can!