MobileCityOnline via Amazon offers the Jarv Big Shot Water Resistant Rugged Bluetooth Speaker with FM Radio in Gray, model no. BTS200, for $28.99. Coupon code "XAGJHWR9" cuts it to $18.99. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.52.) That's the lowest total price we could find by $29. This 2 x 3-watt speaker features a microSD card slot, auto scan presets, and carabiner clip. Deal ends May 16.