Update:

> The 10500 EUR for 5 prototypes increased to 12500 EUR for 3 prototypes

Further increased to 13500 EUR:

"we observed a skyrocketing increase of the prices. [...] As a result, every prototype increased its final cost by around 300-320 euro including 22% local VAT, for a total amount of 1000 euros including PayPal fees for the three prototypes. Long story short, we have to increase the campaign goal from 12500 to 13500 euros."
https://www.powerpc-notebook.org/2021/10/prototypes-updates-and-next-talks-october-2021/