Well, late to the party, but I'll toss out some analysis.
Greener is Brand Value three (BV2).
I'm going to call it an Original Quality grade eight (OQ8) - plain NLNE.
Current Condition looks to me to be "heavy use, but no abuse." I'm buying the idea that it has mostly worn OE finish and the rest of the gun fits to that use/care indication. CC4.
So, BV2-OQ8-CC4 = $1,157. I'd give a confidence range of $900 to $1,500 considering the possible range of OQ grade and CC level. Hope this is of some help.
This gun was, like all guns of Brit Trade origin, sound and usable when it left the shop/factory; Greener's was a factory. With care, good lube, and appropriate fodder it will go bang a lot of times. If the guy privileged to pack it does his part, it will harvest an abundance of the fall's bounty.
DDA
Last edited by Rocketman; 12/12/15 12:31 AM.