Thumb Score: +15

Amazon [amazon.com] has 3-Pack Philips Sonicare S2 Toothbrush Heads (White) for $24.99 – $5 when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $18.74.
Shipping is free with Prime or on $35+ orders.

Savings
Save an extra $5 on your first Subscribe and Save order. (check and activate [amazon.com])