Amazon has 2-Pack Philips Sonicare C3 2-in-1 Plaque Removal + Whitening Brush Heads (Black or White) for $19.99 - $5 when you 'clip' the coupon on product page - $1 (5%) when you check out via Subscribe & Save = $13.99. Shipping is free with Prime or on $35+ orders.

Thanks to Deal Hunter phoinix for posting this deal.

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Available:

• 2-Pack Black, HX9042/95 $13.99
• 2-Pack White, HX9042/65 $13.99