Looking for a new home. I bought used this when I was experimenting with different designs. Only used a couple of times. Been kept in a climate controlled room. Optics are good.
150mm objective, 1200mm FL, f8. OTA is ~25Lbs. So you will need a mount to handle that weight. $200
Detailed review on cloudynights:
https://www.cloudynights.com/articles/cat/user-reviews/telescopes/140mm-refractors/the-6-inch-f8-celestron-c6-r-refractor-r1884