As I write, there is a hurdy-gurdy listed on eBay for $65000. It is described as being at least six hundred years old, and by far the oldest hurdy-gurdy in existence. Looking at the photographs, this is a real museum piece. I am glad that it survives, but it does not look playable. Also, it has only ten keys, whereas for less than a thousand pounds I could buy a new or nearly new hurdy-gurdy with far more keys.
If we're talking mandolins, I could buy an original Mandocaster - with four strings - for around $4000, but of course I could buy one brand new with eight strings for maybe £150.
Earlier this year I sold an Alden mandocaster online, and described it as a vintage mandolin, which is kind of true. It sold for over a ton, which is good going considering the price of a new one.
So my question is, why would anyone want to pay a fortune for a musical instrument merely because it is old? Surely it makes more sense to buy quality at a fair price.