Maybe the charm has gone from BaT or maybe the market has gone south. Look at the high bid on a Speedster today, and compare it with a worse car (rusty enough not to be safe to drive) three years ago. What do you think?
https://bringatrailer.com/listing/1957-porsche-356/
https://bringatrailer.com/listing/1958-porsche-speedster/