One 10" f/8 full thickness pyrex mirror for sale. I bought this mirror about three years ago and it has been on my shelf ever since. Selling this mirror to buy accessories for a recently purchased SCT.
Doing my best at full disclosure:
Manufacturer is unknown as I don't remember what the original owner told me. No wavefront or surface accuracy specs. Used the mirror one night in a temporary setup just to get a peek. Seeing wasn't good enough to guess wavefront error, but Jupiter looked pretty good, so it seemed promising.
The mirror coating is in fine shape except for two flaws as identified in the picture. I tried to get in close and at the right angle; it makes it look worse than it really is, but I'd rather error on the side of caution. The spots don't affect the performance and with the usual coating of dust on the mirror, the spots are hardly noticeable to the eye.
Also noted in the picture are thin slivers on opposite edges that are uncoated due to the holder in the coating process. The widest part intrudes onto the mirror face about 1/16 inch. It looks more than that because the coating is also on the beveled edge. It would probably be best to darken the bevel with a permanent black marker.
I'm not very good at photographing mirrors, but a closeup of the spots is available upon request.
Asking $160 plus shipping.