Winter Proof Antifreeze -50C Burst Guard 3.78L

I bought the wrong product and can't return it. I have 4 unopened jugs of Winter Proof antifreeze with BurstGuard protection to -50°C. Each jug is 3.78L and ready to use. Great for water systems, safe on plastic and metal pipes, and made for Canadian winters. Asking $7 each, or take all 4 for $20!