Posted By:
Todd SchultzI was the second underbidder on the Mack, and might have won had I known how to properly use my snipe service 
I would agree that there are not many set collectors interested in Worch's, but those chasing HOFers, Mack in particular or types are not afraid to search and bid. They do not come up often, but no less so than some other sets --m101-6, Gold Medal and Holsum come to mind.
It's hard to say what's undervalued anymore, but they sure haven't taken off like the other pre-war sets. Flippin' m101s are getting ridiculous, for example.