This doorstop should put out service It should not be considered safe to shoot in any manner. It does have worth as a heirloom and a piece of folk art. But is should not be shot.
Those of you recommend shooting it, answer these questions?
How old is it?
What is it made from?
What has been shot in it?
Was it made with any attention to safe construction methods for a shooting device?
Just looking at it says NO!
None of you know and neither do I, if this thing is safe to shoot.
Advising Auctioneer to shoot it in any way, is irresponsible. I hope you are prepared to accept your liability if the thing fails and Auctioneer becomes injured, because he fired it on your advice.
Now if some knowledgeable competent person examined it physically and determine what is was made of and how it was made. Then checked it to see if it was sound and said it was safe to shot. That would be different.
Until then I stand by my suggestion, spike it!