That is a VERY overpriced Heym on Gun Broker! Mine cost less that half that, and is a better model without the sliding barrel selector on the left side, and came with claw mounts ( $700-1000 new) not a clumsy side mount. If you look close you can also see it has a crack at the tang. Pretty optimistic seller IMHO!
Here is a close up of mine for comparison...
[Linked Image]