Arrow offers the Raspberry Pi 3 Model B Computer Board for $34.99. Coupon code "PI20" cuts that to $27.99. With free overnight shipping, that's the lowest price we could find by $7, although we saw it for $4 less in May. Compatible with Linux, its features include a Broadcom ARMv8 1.2GHz 64-bit quad-core processor, 1GB RAM, and on-board WiFi and Bluetooth.