J,
The value of a Walt or Winnie fly probably depends on when they tied it. The earlier flies being more valuable. Walt's flies go for around $100.00 each. Winnie's flies are less due to the fact that she tied a lot more flies than Walt. I would think an early example would go for about $75.00. Winnie tied beautiful flies. When I was a kid you were told that if you wanted great flies go to Dette's and buy what ever they had..even if you didn't need it or it wasn't the right time of year for the fly. If you wanted flies to fish or match the on going hatch with, try the Darbee's after you went to the Dette's. The school of thought was you might get lucky and the Dette's would have what you were looking for and if they did you probably couldn't persuade yourself to actually use them because they were so good. You would not use all of them or save them for big trout that you may come across. The Darbee flies more than likely were not tied by the Darbee's themselves as they had many tiers tying for them. If you did get some flies tied by the Darbee's again, you would have a hard time persuading yourself to actually fish them.