Several years ago, I talked my riding buddy into getting a Prologue because I found it to be the most comfortable saddle I had ever ridden. I bought mine from a bike shop and he bought his from Amazon for $129.00 because it was cheaper. After a few months of riding on it, one of the rails started to come lose. He called Amazon for an RMA number and they told him he had to return it to ISM. ISM told him they wouldn't accept the saddle because the original purchase was not from an authorized dealer, which Amazon is not. I guess you can buy the saddle at $130.00 all day long but just don't expect any warranty work from ISM if something goes wrong, especially if you purchased it from someone like eBay or Amazon.