Dell Home, via its Member Purchase Program, offers the Sony SRS-XB2 Portable Bluetooth Speaker in several colors (Black pictured) for $78. Plus, Dell Advantage Rewards members bag $25 in Dell Bonus Rewards. (It'll appear as a credit in your account. Not a member? It's free to join.) Assuming you'll use the credit, that's the lowest price we could find by $24. It features two 1.7" drivers, NFC, and up to 12 hours of battery life per charge.
Note: Dell's MPP is available to select groups, including students, government employees, military (active and retired), credit union members, and health care workers.