Looking at the photos and considering it's missing the case , and these came in an awesome one when new , I would say anywhere between $800 - $1000 as it is a quality Japanese telescope that needs a bit of TLC and the optics and build will be top knotch !
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108mm aperture at f15 will make this scope a real Luna and Planetary scope and if you wanted buy a 0.965 inch ( thats the eyepiece barrel size ) to 1 1/4 inch adaptor you could use modern Orthoscopic's or Plossl's ( eyepiece designs ) to really make this bad boy sing b.
AWESOME SCOPE
, and don't sell it cheap as it's worth quite a bit .
Brian.