Amazon offers the Whetstone Black & Blue Tactical Rescue Knife, model no. 25-SP606-B, for $5.99. (Walmart has it for the same price via pickup.) Plus, Prime members bag free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise it adds $5.58.) That's the lowest total price we could find by $2. It features a 3.25" stainless steel blade, seatbelt cutter, glass breaker, liner lock blade, and belt clip.