+1 with storm22. The Invasion, while a great piece for the Stroker, was not a hugely popular piece as far as continual usage. People bought it, didnt have enough oil for it, and it ended up sitting in the bag. While it could still rival some of the other strong symmetrical pieces for strong movement, its not the latest and greatest or the most popular of pieces. I think 125 shipped is a more than fair if you can sit on it. 100 shipped would be good if you were looking to get rid of it faster, but no lower. Its still a high performance ball at a less than high performance price.