You'll likely just find that most users started out with 8",10" or a 12" Dob, and have since upgraded to newer more expensive equipment, hence are selling their old equipment they no longer use.
I would say Dob's are "the best way" to get started. Views.. amazing!, Ease of use/Simplicity... awesome! Beginner astrophotography(solar/deep sky).. suitable with accessories.
Nothing wrong with standard dobs at all. Flex Dobs? Try mounting one on a GOTO mount.
Just last year I recall there were eight to ten Meade 12" LX200's up for sale almost 2 weeks in a row!!
