Like all things old, if they are a rarity, even if rubbish when new, then the value (AKA Cost) will go up sometimes out of all proportion.
Actually when I started photography the Edixa was about the most common Reflex available at the time. Most models only had a limited range of shutter speeds 1/30th to 1/500 or 1/1000. There was a model I think was called the Edixa Prismat 'D' had a full range from 1 Sec to 1/1000, but was quite a bit more expensive. The only lens I seem to remember being used on the models advertised for sale in UK, was the ubiquitous 50mm F2.8 Tessar. (Apart from wide angle or telephoto).
I have just searched under 'Edixa reflex cameras' and there is a web page with masses of pictures of this make. Including some with Schneider Xenar and Xenon standard lenses