The internet has opened up public auctions to a worldwide audience.
Some sellers are ignorant, others intend to deceive which means that care must be exercised when buying antique ear trumpets.
This page is for collectors, to get one to use, read
Buy One
In addition there are a large number of items that were sold in Victorian times which did not work, this trade has never really died out.
When I see an item up for auction which is improperly described (see
fakes), I respectfully suggest to the seller that they might want to correct their listing. Responses vary between 'thank you very much, I will update the listing' and 'mind your own business' !
If you put the small end of a 6inch diameter funnel in your ear and test it for an increase in noise level, you will certainly find that it works rather well - but we all know it was never intended to be an ear trumpet and is probably newer than claimed.
If you want to buy a antique ear trumpet, the following should be considered: