Keebart is located in Germany with free shipping on most keyboards. I’ve been very happy with my Sofle v2 and after sale support from him. He uses USB-C for the right-left connection rather than TRRS, which I find to be nice.
The Sofle was an easy intro to split ergo boards. I had a Keychron Q11 and switched to this, which has a number row and 5 thumb keys.
The case is 3D printed, so not ZSA quality, but I have no complaints. He does offer aluminium cases though if you want to spend more.
Paywalled? Unless my system just bypasses it, I didn’t note one