Trapper - $200 sounds like great price for a NIBFW.
I don't know price diff between Brownells and direct from Wollf.
Consider a recoil spring calibration pack eg. from Wolff since you need to find the right one:
Recoil Calibration Pak includes 1 each 14 pound factory recoil spring and 1 each of 16, 17, 18 and 20 pound extra power recoil springs. 3 extra power firing pin springs are also included.
I've got factory 14's plus 16,18 and 20. As I said prior, I don't find much racking diff between 16 and 18 in Model 39's. I haven't used the 20#.