I can't say the Orion is the same, but with my Meade they glued the mirror to some sort of cork backing with a heavy weight attached. And this was all in a sealed tube with no ventilation. Thermally it was kind of terrible.
And also oddly heavy. I always wondered why folks would claim to carry their 6" dob with one hand and so on, and why I was having trouble. Well, my dob was extremely unbalanced with a heavy weight at one end.
And yep, 8" is better than 6". I'm seeing a skywatcher 200 w/ everything new for $655 and a 150 for $467 new. Orion dobs seem to be around the same price.
So $250 is a fair price, but I'd offer less if you decide to go for it. Sometimes 8" dobs pop up with everything, including the base, for around $200-250 (I see an Orion 8XT selling locally to me for $300 right now). And he's been ever-decreasing his price, as it hasn't been selling, so he may take less.
Edited by Anony, 23 May 2023 - 08:52 PM.