Amazon has the Tribit MaxSound Plus 24W Portable Waterproof Bluetooth Speaker (Black, 5962898564) for $39 with free shipping. List price: $33. Features up to 20 hours of battery life, IPX7 waterproof, secure connection and lossless wireless sound at a range of up to 100 feet. Has excellent Amazon Reviews.

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eBay has the Bose SoundLink Mini II Portable Wireless Bluetooth Speaker for $100 with free shipping. List price: $200. Features built-in microphone, 3.5mm auxiliary port, up to 10 hours of playback per charge.

$100 Shop Now

Amazon has the OontZ Angle 3 Bluetooth Portable Speaker (Red) for $22 with free shipping on $25+ or with Prime. List price: $30. Features up to 14 hours playtime at 2/3 volume, built-in microphone, IPX5 water resistance, up to 100-foot wireless range.

Has good Amazon Reviews.

$22 Shop Now