We have a 13.1" Coulter Optical Odyssey (Old "blue" version) that is just not getting used at all. It is in fine working condition (as if there is really a way to screw up a Dobsonian mount). Both mirrors could use a gentle cleaning (ASK if you need to know how to do this before you ruin the mirror coating!), but coatings are in good condition. Could also use a new paint job, but that's purely cosmetic... and who can see it in the dark anyway, right? Anyway, it's priced to sell quickly at $425. Must pick up in Vancouver, Washington (Portland, Oregon metro area). Drop me an email... or call me at 360-258-5593. Leave a message if I'm not home.