Used Askar M54 OAG Off-Axis Guider

Condition: This is an Askar M54 OAG Off-Axis Guider in good condition.  The body is clean and unmarked.  HOWEVER . . . there is a small chip in the prism.  See the photos.  The previous owner has assured us that this chip does not affect its use/operation.  However, this is a pretty significant defect in the operating end of the OAG, so we have discounted the price heavily - it's ONE-THIRD the new price.   Meanwhile, all of the nosepieces are present - some never out of their original wrappers - in the original box with manual.                 Improve your guiding with Askar's Off-Axis Guider (OAG)! The prism of this M54 off-axis guider measures 10 mm x 10 mm. This larger area allows the OAG to collect more light and makes it easier to acquire the targeted star for automatic guiding. No need for a separate guide scope. On the telescope side, the Askar Off-Axis Guider can be attached to M54 threads with the included front gasket, or to M48 or M42 threads with the included adapters. Sim