BTW, back in the late nineties I bought a good Blaupunkt car radio. It was of interesting type, based on Motorola Symphony SDR chipset (unfortunately, they'd killed it eventually). To prevent it from being stolen, I'd decided to make it easy removable. That resulted in quite complex mechanical design (see the images). But I do remember that it was problematic to identify a suitable RF connector. I was looking for a spring-loaded bulkhead type connectors with high number of mate-unmate cycles. To my surprise, for best types, that number is about hundreds, not thousands. Found a promising type, of Fisher brand, but it was expensive and with long lead time. So I ended with old soviet СР-75-522ФВ (officially rated for 100 cycles) and bought dozen of them.
Edit: One may ask a good question, what's in common between this thing and the topic. Well, I also think it worth 15.000€ because it's of true metal, custom design and is light-years ahead of similar Asian products.