Today only, various third-party sellers via eBay take 10% off a selection of automotive parts, tools, electronics, and more via coupon code "PEDAL2METAL". (A $100 maximum discount applies.) Plus, most of these items receive free shipping. Many exclusions apply. A couple of best bets, with prices after coupon:

CO-Z 186-Piece SAE/Metric Auto Home Repair Tool Set w/ Case for $40.49 (pictured, $5 off)

Launch X431 Creader VII+ OBD2 Code Reader Diagnostic Tool for $114.75 (low by $4)

Note: This coupon can be redeemed once per account; it must used within a single transaction (and can include multiple eligible items).