Thumb Score: +12

Amazon [amazon.com] has 12-Count Gillette 5 Mens Razor Blade Refills for $23.27 – 15% when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $18.62.
Shipping is free with Prime or on $35+ orders.

Savings
Extra 15% on the first order. (check and activate [amazon.com])