G-Shock on Amazon. I've purchased a few that are much, much cheaper than from local retailers.

https://www.amazon.com/gp/product/B00J5PYFD4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

https://www.amazon.com/Casio-GA100-1A1-Mens-Black/dp/B003WPUU0U/ref=sr_1_3?ie=UTF8&qid=1522679567&sr=8-3&keywords=G+shock

G-Shock is cheap and very durable, plus fashionable.