Gently used (or new!) is preferred.
I will check when I get home to see the tooth count on the two I have at home (12-25 I think). I am getting my 10 speed cassette Thursday, so timing may work out.
I have a SRAM 12-26?
Jason - did you check the tooth count? 27? *fingers crossed*
Andy - possibly. Not sure if it's okay to mix/match brands, but if it keeps me away from parked cars, I'll try it out. Cost?
The good news is that my Ultegra cassette is a 12-27. The bad news is that I always thought I was sprinting on an 11 which means I am not as strong as I imagined. My email is firstname.lastname@example.org. I am in NY right now, but I have it and can ship it to you or we can do an exchange when I return to DC on July 4th. I was thinking $30. It is in very good shape (maybe 500 miles). If you want it shipped email me and we can talk about that. Or let me know if you want to exchange after the holiday.