Those people keep the techs of the world in business

I agree with sax maniac. If you'd consider an original Super Action 80 a vintage horn, but it is a pro horn, I played one for two concerts, and several rehersals. It was my band directors. I've had almost seven years experience on sax (just a fraction of what some of these folks have had, but I'm no beginner by any stretch of the imagination), and I found it very hard blowing. There was no way to play a low Eb or low G for that matter quietly; you had to snap the air through in order to get a sound; something you can't do in Wind Ensemble. But that's just an example, I think, of what sax_maniac said. Now I'm getting a Selmer LaVoix, a pro horn considered by most. But that's b/c I've had seven years experience and I am intending on making a career out of it. I've heard wonderful things about the YAS-23. I'd stick with it. Heck, I still have my decade+ old Armsttong that got me through five years of my sax career. Consider this. You're just starting out on sax. Suppose a year or two down the road after you buy your $5,000 Mark VI that you no longer want to play it? Keep it? Save it for your kids who might not even want to touch it? Or try to resell it? The resell might work, but for now, it might not be worth to shell out that kind of money for say, a Mark VI (considering you wanted a pro vintage horn). Good luck and happy saxophoning!