In the Amiga world, it is best to buy things when they are available as waiting can mean that you eventually pay more on Ebay for a second hand item.
In the real world, a lot of people aren't just sitting on money to throw at Amiga stuff when it's released. Sadly, this is a true story.
It does seem, though, that Jens has a good feel for this and plans a second model/release after the first dries up.
As it is for me, I'm putting coin together to get my CSPPC fixed.