I've just been looking at aireslfrex tlrs on PicClick UK (shows ebay listings all on one page that you scroll down), and on G*^gle and it seems while they have a range of models, from those with round lens barrels which may be push-on or screw-on to those with bayonets, (presumably Rollei 1) and while they have different ranges of shutter speeds and shutter makes, even those with f3.2 viewing lenses have darker viewfinders than my Yashica 635, and with a huge amopunt of vignetting, although sveral do have finders that seem bright right in the middle, I think an after-market screen is more or less necessary, (even though there are some photos that seem pretty sharply focused I've no idea if they have the original screen). Some of them come with Nikkor-Q lenses and some with Zuiko lenses.
They weren't made for very long so who knows if they were good or not. Let's hope other members have some info on quality and reliability.