For in-store pickup only, Micro Center offers the Raspberry Pi Zero Wireless Single Board Computer, model no. 232884, for $10. Although that's list price, it's a great deal for this just-released WiFi computer. (Several eBay sellers are charging around $30.) That's the lowest price we could find by $19. It features a 1GHz single-core processor, 512MB of RAM, 802.11n wireless, and microSD card slot.