Walgreens has Select Crest Toothpaste on sale for prices starting at $0.99 when you login to MyWalgreens (free to join) and clip the coupon on the product page. Select free store pickup where stock permits, otherwise shipping is free on orders $35+.
Note, availability for store pickup may vary by location. Must be logged into account to use coupons.
Thanks to community member JMF8448 for finding this deal.