I urgently need money next month, so please purchase as soon as possible. I am open to some price negotiation. I am selling this because I changed the mount. When not in use, it was stored in a dehumidified storage. I purchased it at the beginning of this year and used it mostly indoors, with only one instance of taking portrait photos at night, so it hasn't been used heavily. PENTAX GPS UNIT O-GPS2 Astrotracer (No box, instruction manual included) PENTAX CS-310 Cable switch I will include these two items as a set. You can start astrophotography immediately by combining it with a PENTAX kf, etc.