I have for sale a 6" Celestron Starhopper. This has a single-stalk secondary holder, sloped-back primary, and both primary and secondary have easy to use thumbscrews for collimation.
I'm not the original owner, but scope has been well cared for, and produces sharp images. I added carrying handle to base and high-tech Saran(tm) dust covers.
Comes with original 25mm SMA eyepiece, original 6x finder, and collimation cap, $200 firm. Cash only. (I'll throw in 10mm Sirius plossl and Orion moon filter for another $25)
This is a pickup only, I can't ship scope at this time. (Logan County)