That is way too high a price for used. Also, unless you have other horses you are currently riding that it would work for, I would wait until your horse is older before spending that kind of money on a saddle, unless money is really no object for you.
I have a 2Gs, and it’s honestly the only CWD I like riding in. I’ve ridden in several in addition to all the demos I tried. I was nervous because my horse has been growing/changing shape, but my existing saddle (a Childeric) made him very unhappy. I sat in several other saddles which also made him very unhappy. I as worried that the tree would wind up being too narrow, although the SE01 in medium-wide was too wide at the time of fitting. I was worried that the 2Gs would be too tight in the shoulder in order to have enough wither clearance. However, his behavior says he likes it. I rode in a demo several times that was very similar but not quite the same in the panels. He would get pissy and buck, just not as much as in my old saddle. His behavior has been great in my 2Gs, considering he is a very obnoxious youngster.
I did have an issue where the front panel came unscrewed after a few weeks. I had to send it to California for repair, but it was a pretty easy process and handled quickly. During the time it was out for repair, I realized how much better balanced I was in the 2Gs on my horse than the Childeric. The Childeric’s poor fit on him put me a little in the back seat and I couldn’t see a distance (even to ground poles) to save my life. And horse was telling me right away he was not happy with the saddle change.
I think that for my horse if I had to go to a different saddle, I’d look first at Tad Coffin with SmartRide. I almost did a demo from them but was worried about wither clearance since the panels are very, very squishy. If I could have found a demo locally (rather than having to ship from VA), it would have been easier. I had ridden in a couple TCs back in the 90s/early 2000s, and while they were fine (and have changed a little bit since), they weren’t my favorite, so I was hesitant to pay to ship out a demo. I have also not had great luck finding good condition TCs on the used market, and new is up there in price with the 2Gs.