300 PowerPoint Backgrounds for PC or Mac for $10 + free shipping
ThinkEDU via eBay offers this 300 Backgrounds For PowerPoint: Volume 1 for Windows or Mac for $9.95 with free shipping. That's tied with last month's mention as the lowest total price we've seen. This CD contains 100 unique royalty-free designs, each in three color schemes, in JPG format, compatible with all versions of PowerPoint.