Today only. Newegg with SpeedShop has the Autel MaxiScan MS300 OBD-II Code Reader for $19
with free shipping. Compatible with 1996 and later OBD II-compliant vehicles, reads and displays Diagnostic Trouble Codes (DTCs). Now you'll know whether you need a new engine or you're just low on wiper fluid. Amazon
has it for $20
with free shipping on $25+.