you may know this but that SD isn't a stand up. FWIW, sea-doo's with the early 957cc engines are prone to water injestion. There was a factory retrofit to help prevent that so make sure that was done. I'd still avoid that engine but that is just me.
Price seems a little high to me but if it is the perverbial 'cream puff' then perhaps.
can't help you on the stand up's...no real personal experience.