For Sale: Shimano Ultegra 9-speed cassette 12-27t

Ladies,
I just got a second wheelset, and it had a 9-speed cassette on it - my bike is a 10-speed, so I have no need for it. It's in excellent condition, around 100miles on it. I'm asking $45 which includes shipping (within the US). Here are the specs:

The Shimano Ultegra CS-6500 9-speed cassette gives your road bike fast and responsive indexed shifting.
• Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting
• Five largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity
• Drilled out sprockets for less weight
• Chrome plated for added durability and longevity
• Lightweight 9-speed sprockets provide a wider gear range
• Use of identical drivetrain specifications allows complete interchangeability between Shimano 105, Ultegra and Dura-Ace 7700 series components

Shimano Ultegra CS-6500 9-speed Cassette
COMPATIBILITY: Shimano 9-speed
MATERIAL: Chrome-Plated Chromoly
SIZE 6: 12-27: 12,13,14,15,17,19,21,24,27
WEIGHT: 210g