Thanks for that Ivo. Yes, prices can start at €100 for the small, common yellow pieces, rising up to ~€500 for the rarest colour, which I think is red?
Anyway, here's a close-up shot of the surface - used a tripod and it still got blurred, and the base shot showing the L(eerdam) and C(opier) mark. The chipped foot is top-right but, hey, great for displaying!