I have one of these Sporting Clays Poli guns. Mine has the finest single trigger I have ever used on a double gun.
For reference, I paid $3250 for mine years ago. I considered it half off the last msrp. The Euro spiked against the dollar as these guns were being made.
When the economic reality settled, a decent Model 21 was cheaper. It killed the Poli Clays gun.
To answer your question.
Boxlock non-ejectors are dead in the retail market. The Sporting Clays guys only shoot SxS as a side event to kill time. The positive is it shoots any ammo you can get your hands on these days.
Not to hurt any feelings, but allow $400-600 for a fix to get it up to a reasonably priced Clays gun.
$2000 + or - $250.
Expect less from a dealer.

PM if you need to.

Joe