The only true indications of current prices are the auctions with no reserve. Auction such as gun broker, that reaches wide audience sells now a common SA RZM in med. condition for well under $400
look at this auction
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=179129314

an SS dagger for about $800
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=175867673#PIC

nice army dagger for $360
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=182583084

nice rzm people willing to pay $360
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=182153006#PIC

early maker SA with a hanger $415
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=181726363

these are the reality prices and when the dealer places "Sold" with some crazy high price, one must think if this is a true price.
We can argue endlessly about what is price, but the above auctions show it. It went down 30-40% from the peak.