They are rarer guns. From what I've learned,, somewhere around 250 or so,, were built. Not common.
Prices are hard to put on such items,, due to the timing of a sale,, vs the current market etc.
And if in an auction,, all it takes is for (2) people to really want it to drive the prices up.
Or, if nobody sees it or wants it,, it can go cheaply.
The ones I've seen sell on an open market have been in the $1200 range,, and it's been a while since then.