Casio's water-resistant watch is $17 at Amazon right now
Amazon.com: Casio Step Tracker 100M Water Resistant Men's Digital Watch LWS2200H-8AV : Clothing, Shoes & Jewelry
Amazon.com: Casio F108WH Water Resistant Digital Blue Resin Strap Watch : Classic: Clothing, Shoes & Jewelry
Amazon.com: Casio Women's LA670WGA-9 Gold Stainless-Steel Quartz Watch with Digital Dial : Casio: Clothing, Shoes & Jewelry
Amazon.com: Casio G-Shock Mirror-Metallic White Mens Digital Watch DW6900NB-7 : Casio: Clothing, Shoes & Jewelry
Amazon.com: Casio Illuminator Extra Long Strap 10-Year Battery 100 M Water Resistant 5-Alarm w/Countdown Timer Men's Digital Watch, Black, AE-1500WHX-1AVCF : Clothing, Shoes & Jewelry
Amazon.com: Casio Mens G-Shock Digital Watch, with Quartz Digital Movement, and Multi-Function Alarm, Stopwatch, and Countdown Timer, Features Hourly Time Signal, Auto Calendar, and 12- and 24-Hour Formats, Water-Resistant to 200 M (
Amazon.com: Casio Men's W-800HM-3AVCF Classic Digital Display Quartz Black Watch : Clothing, Shoes & Jewelry