Got this at the auction as a 12" scope, but it's a 10". Price is same as I paid, minus the 25mm eyepiece, but plus my sweat equity. 

10" Meade starfinder dobsonian telescope.

52" tall with base, so probably f/4.8 or 4.9

Got this with the intent to rebuild a 12" as a truss tube, but decided not to based on dimensions.

Mirror was removed and cleaned, and is showing some thinner spots in the aluminum coating, but nothing egregious.

No modifications were done to stock design, except to clean the mirror and tune up the base movement (base turns nicely, but trunnion balance is tricky).