Old eyepieces/barlow/glass lenses - how much are they worth?

[bendiddley]

I have just acquired a load of eyepieces and there are some old ones which I don't want and would like to sell on including an old barlow and some glass lenses too, but I don't know how much they are worth, was hoping someone with a bit more knowledge might be able to help? The diameter of the barrels are as follows: Image 1,2 and 3 = 1.25", Image 4 = 30mm, Image 5 = 20mm. See below photos.

[Charic]

The Erfle Circle T looks interesting, sure someone would be interested in that one, not certain about the Westinghouse box set?
Not sure the K Kellner is worth anything, but there's always someone looking?

There are folk here better acquainted with eyepieces than I, so don't hold your breath just yet!

[bendiddley]

Cheers. Hopefully will hear from others too.

[michael.h.f.wilkinson]

It might make a difference if you could tell us what barrel size they are: 0.965" or 1.25". Some collector of older Unitron or Polarex scopes or the like might be interested in the former case, they would fit more scopes in the latter, but perhaps be less collectible. The R40 is probably a Ramsden 40mm. Again, some collector might like that, but otherwise you can get much better performance EPs in that focal length nowadays

[Star Struck]

A couple of Celestron Circle T 20mm Erfles went for between $42-$65 in the past couple of years.

Depends on condition and how much somebody is willing to pay.

 

[bendiddley]

1 hour ago, michael.h.f.wilkinson said:

It might make a difference if you could tell us what barrel size they are: 0.965" or 1.25". Some collector of older Unitron or Polarex scopes or the like might be interested in the former case, they would fit more scopes in the latter, but perhaps be less collectible. The R40 is probably a Ramsden 40mm. Again, some collector might like that, but otherwise you can get much better performance EPs in that focal length nowadays

The diameter of the barrels are: Image 1, 2 and 3 = 1.25", Image 4 = 30mm, Image 5 = 20mm. Have just edited my post to include this.