I have a Konus 150mm Maksutov Cassegrain OTA for sale. I bought it with the intention of using it for solar work, but plans have changed and I am now selling it. It is in exactly in the same shape in which I received it. The glass is perfect and the dreaded flashlight test reveals no apparent sleeks or flaws in the glass or the mirror. It is well baffled and is of very sturdy construction. It will arrived at your door in its original packaging. It comes with a very nice 8x50 finder, two plossl eyepieces, and neutral density moon filter. It has no tube rings, but has a mounting block which will fit some Chinese mounts. Tube rings can be acquired from other sources, if required. Only $500.00 plus $25.00 shipping.
I will respond to emails this evening after work.
Thanks for looking,