I have a nearly brand new, less then a year old, UO 40mm Mk-70 Konig eyepiece in excellent condition. There are no marks anywhere on the eyepiece and it has it's original box and endcaps. I'm moving up to a 31mm Nagler and no longer need this fine eyepiece. I would like $170.00, which includes Priority Mail in the Continental United States. I take PayPal, Cashiers Checks or Money Orders. If in doubt, read some of the great reviews about this eyepiece at CloudnNights and Excelsis. Don't miss this chance to get a superb super wide field (70 Degrees) eyepiece for a great price.
San Diego Astronomy Association