This is valid reason for enforcement of the rule.

What’s at issue, in all of these cases, is the lack of reasonable judgement of the case (appeal).

eBay’s place in the market (different from, say, Amazon or Walmart) is private sellers selling used items, vintage, collectible, rare, antique. This is exactly what this item is.

No average person would ever conceive of the item as itself being dangerous or harmful (like a gun or brass knuckles).

Whats more, no one would object to selling this antique on eBay to, say, a pharmacy to sit as decoration on a shelf.

On the face of it, it seem unlikely an impartial judge would rule the seller was not a good member of the EBay community, and deserves a restoration of their privileges.