Bestbuy offers Insignia - Rugged Portable Bluetooth Speaker - Black for $9.99 (orig. $19.99) with free store pickup.

Product Description:
Listen to music on the go with this Insignia NS-CSPBTF1-BK speaker that features a durable construction for easy transport and a splash-proof design for defense against water. Bluetooth technology lets you wirelessly stream music from compatible devices.

• Compatible with most Bluetooth-enabled devices
  For wide-ranging use.
• Rechargeable lithium battery
  Provides up to 6 hours of playback time on a full charge.
• Speakerphone
  Enables simple hands-free chatting via a compatible cell phone.
• Splash-proof design
  Helps prevent damage caused by water infiltration.