WTT or FS: Shimano Ultegra 9 speed cassette

I'd prefer a trade for a 10 speed cassette but lets see what's offered. I bought wheels yesterday and this cassette was included. My bikes set up for a 10 speed so it's useless to me. I was told the wheels and cassette have "about 1000" miles on them. I can say that personally they look to have less.