This is a "generic" red dot finder that came w/ my ETX 90. It is in great condition and comes with a mounting bracket. I am unaware of the manufacturer, but it appears similar to the one offered by Orion for $35. I am selling b/c I simply prefer to use a Rigel Quickfinder with my ETX.
Will sell for $15 shipped in ConUS. Money order or Paypal (+3%).