This is an old C90 Maksutov-Cassegrain OTA that I got in a trade. The seller misrepresented the condition - he told me it was functional but it's not. I don't trust him anymore, so I am just going to sell it to someone that wants to fix it up.
Here are the two problems with it:
1. It looks like someone touched the primary mirror as it looks like a poor cleaning job or something. And, the collimation screws are missing - think they were screwed too much and fell behind the mirror.
2. The focusing (achieved by turning the tube) is very loose. I think that a gasket should be there to tighten it up.
A few years ago, I would have worked on it myself, but I don't have the time nor motivation now. It is possible to get this into working condition. The corrector plate/mirror is in excellent condtion, and the primary can always be recoated.
So, I will throw it out to Astromart to see if anyone wants to take it on. For that matter, you can always send it to Celestron, but I don't know what they would charge.
I gave this guy $150 in trade, but it is not worth that, and I won't roll you. So I am asking $35 (of which $8-10 will be shipping via Parcel Post) to anyone that wants it. No accessories are included.
Thanks for reading.