amazon.com has the 6-Pack of Colgate Extra Clean Toothbrushes (Full Head, Soft) for $4.44. Add three packs to cart (18-Ct total) to reach $13.32 – 5% off with Subscribe & Save (cancel anytime) – $5 off at checkout (“Multibuy discount”) = $7.66 with free shipping on $25+ or with Prime.