I bought Pentax own 100mm f/12 refractor demonstrator.
It is essentially perfect.
It was on display in a camera shop for several years.
I couldn't afford the 1980s price of £2,000 plus, so I went in person to the Pentax importer and said I could afford £250 in cash.
The boss looked carefully through the various years write down values and to my amazement said Yes.
I said I would go and get the money and bring it to him.
He said no and I should take the money and give it to the shop owner.
The shop owner was furious, but Pentax had given him instructions, which he had to follow.
I put the scope in a taxi and took it home.
If a demonstrator is actually in use, it is likely to be good, certainly not bad.
It is probably better than an average boxed example.
However, buying a demonstrator remotely is a different kettle of fish.
It may be faulty.
My Pentax had one eyepiece missing and also the solar projection screen, but minor problems.
The eyepieces were noted for being the best except maybe the Zeiss Abbe eyepieces.
I would certainly prefer a tested demonstrator, with no obvious faults, than a boxed anything.
I saw a customer buy a cheaply offered demonstrator video camera.
He went to the bank, got the money, and was handed the bag containing the expensive video camera.
He came back in the shop after this transaction outside the shop, because the bag wouldn't open.
It was sewn shut.
When he eventually unpicked the thread, he found that he had purchased one house brick for a lot of money.
The thief was long gone, but I saw her sometimes roaming the street.
Regards,
B.