Thumb Score: +13

Amazon [amazon.com] has 18.5mm Casio F-91W Classic Digital Watch for $18.95.
Shipping is free with Prime or on $35+ orders.

Walmart [walmart.com] has 18.5mm Casio F-91W Classic Digital Watch on sale for $18.95. Shipping is free w/ Walmart+ (30-day trial for $1 [walmart.com]) or on orders of $35+; otherwise, select free store pickup where available.