I currently have the following OAG for sale. Its very versatile and easy to use. 3 slots to slot the prism into to locate your guide star.
http://www.teleskop-express.de/shop/...rt-design.html
Anyone interested please call me on 0428727976 or email me at
ntk.thava@gmail.com. OAG going for $250 (shipment within Australia included)