What about 28 ga British guns? These are a lot more desireable than a 16 with its marginal difference in weight to a 12 ga and mainly the availability of cheap and plentiful ammunition.
As an aside, I have a painful rotator cuff injury in my left shoulder, I am lefthanded, and have been shooting my Remington 1100 28 ga Sporting semi-automatic all summer in sporting clays shoots and my scores, such as they are, were much the same as using my Beretta 682 prior to my injury.
So, I'll start the ball rolling, 300 percent premium for a Webley and Scott 700 BLE in 28 ga?