Xcceries via eBay offers the 30" Round Barber LED Pole Light for $63.95 with free shipping. That's the lowest total price we could find by $16. It features red, white, and blue rotating LEDs.
Rather go old school? Sourceplus via eBay offers a more traditional 30" Barber Striped Pole Light for $52.75 plus $14.95 for shipping. That's another price low, this time by $5.