Yallstore via eBay offers the Android CAN OBDII/OBD2 Diagnostic Scan Tool for $8.93 with free shipping. That's tied with our mention from last July and the lowest price we could find by a buck. This wireless Bluetooth device scans OBD2 and EOBD vehicle codes to reveal the reason you're getting a "check engine" light on your vehicle. It includes over 3,000 generic code definitions and is compatible with Android phones.