New in box, Kelley Offset Sight for a Sharps setup.. They are $765 plus tax and shipping IF you can find one, but they are constantly out of stock the last year. $500
Link: https://www.buffaloarms.com/kelley-k-o-s-sight-copy-of-dr-akelkos.html
Link: https://www.buffaloarms.com/kelley-k-o-s-sight-copy-of-dr-akelkos.html