NZ this has been discussed of late ,,over and over again.
What a gun is worth is exactly what a motivated buyer is willing to pay ,and a motivated seller is willing to sell for.
Being a 3" model 66 collector myself ,I can only tell you that
these guns earn their praise and reputation.
They shoot like much larger guns and carry like much smaller ones.
There is a certain look about the 3" barrel with the shrouded
underlug on the round butt frame that drives auction buyers crazy.
All that said , I have 5 of these little suckers , and have paid between $500. and $700. for each.
3 things to remember when buying a used gun, 1. Condition. 2. Condition. 3. Condition.
Good luck and good night , Allen Frame