Hi Bob,
Regarding Bill Bagwell. His long term collectability has been hurt by his drifting in and out of the custom knife market. While he became a Master Smith at the same time as Bill Moran did up until recently you would be hard pressed to find people who knew who Bill was. He has done a good job of marketing himself in recent years.
However, his work is not as sought after as other ABS Master Smiths. The heir apparent to Bill Moran is Jerry Fisk. His work along with Harvey Dean, Jay Hendrickson, Rob Hudson, Keith Kilby, Tim Hancock, Steve Schwarzer, Joe Flourny and Dan Peterson. Are among the most sought after int todays market.
One rule of marketing that many makers overlook is that you have to remain consistently in the public's eye to create a demand for your knives in both the primary and secondary market.
Any questions as to what is hot and/or collectabile in any market, visit any well known dealer at a major knife show and look at their table. Those knives are not on their accidently.