I was wondering about the death of the 45 recently - I have a 45 shield that’s been on consignment for 3 months now...
If no one was looking at your handguns, it was probably due to condition and/or pricing, not the fact that they were revolvers and .45s.
OR it might simply be the fact that no one (so far) has been interested in your Sheild simply because of what the design is. Not everyone is interested in that kind of pistol. I for one, have zero interest in any plastic framed hammerless centerfire pistol, no matter what caliber it is in, or how many rounds it holds.
I think declaring something is "dead" because it is not currently holding the number one sales slot in your local area is more than a bit unrealistic.