LA Police Gear offers the Fenix PD20 Cree R5 180-Lumen LED Flashlight
(pictured) for $34.99
for shipping. (Choose "USPS Mail" to get this shipping price.) That's the lowest total price we could find by $9. It's waterproof and features three brightness levels with several output types (SOS, strobe, and others).
Also available is the Fenix LD10 Cree R5 100-Lumen LED Flashlight for $33.99 with $3.99 for shipping. That's another price low, also by $9. It's also waterproof to IPX-8 standards and features two spare O-rings, three brightness levels, and more.