I would like to trade my cla'd (and flocked!) Yashica Mat 124 for a 6X6 folder like a Voigtlander Perkeo (Color Skopar), Balda Baldax (Schneider lens), Franka Solida (Schneider lens), etc.
If you are interested, I can send photos of the camera and samples of what I've taken with it. I would also like photos and samples from your folder.
I have a Zeiss Nettar 6x6, I love a camera that fits in my pocket and takes square negatives. I also have a soft spot for Yashica TLR's. Very tempting indeed.
The camera is a Yashica 124, not the G. Mark Hama did the cla, I did the flocking to cut down on flare that Yashica tlrs can be subject to. I've heard that the 124Gs had more plastic components in their construction. I have a very weak spot for Yashica tlrs too, but I would really like a good folder. I had Balda Super Baldax that I regret departing ways with. I have a case for a Certo6 folder but no camera (long story there) but I thinking a good working Certo6 would cost more than my Yashica tlr.
I have a Solida, but its Prontor shutter hung hideously, and my attempts to fix it did not go well, so it will need a full scale CLA. Thus, your MAT is worth far more than it. If you had a similar project camera, I might consider it.
It did have the Schneider 75 f/2.9 that took some surprisingly good photos wide open.