They say what a valuer says and what people will actually pay are two different things.
In the case of a nos red Vortex, I'm confident it would actually exceed what any "valuer" says.
Personally, I would be happy to spend a three figure amount on the modest end of the scale for one in good sound used condition.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!