Hi. I will preface my inquiry with the fact that i am a novice to the older Mercedes arena. I've found a fellow in Canada who is selling a 1972 250 Wagon. He says it is a rare prototype, 1 of 200 made. It looks legitimate, not something made up with a MIG in someone's metal shop. I can't find anything on this prototype on the web. I've always like the 250 and recently i've been in the market for a wagon, so i really find this car intriguing, but want to know what i might be buying. Any input appreciated. Thanks, -paul