I changed my original plan to use an old Blaupunkt radio for several reasons and so my search for a reasonable priced "Classic car" radio began. There a only a few options, like the Retrosound:
current sales price in Germany, including the correct face plate: around 340 €
The Becker Mexico 7948 - discontinued, current market prices up to 3.500 € !
look here for more Info: becker mexiko-7948
and the Caliber RCD 110: market price around 110 €
The only thing about the Gelhard / Caliber radio I don't like is the red illumination - but I think this can be solved. What a marketing desaster! A "Classic" radio with blue / red illumination - if they would switch to amber / green - they would sell far more of those!
So you can already guess which one I chose... More on that later