Resolume Forum

Not full rubber, but they are something like soft/smooth quality plastic.
As for the price, it's high because of the low quantity production, the handmade enclosure & assembly and the prices of its components.

Vavdo is a minimal OSC/MIDI controller. Unlike the times of complicated controllers, Vavdo A2
is a "simple" physical interface with 6 knobs, 5 buttons & 6 programable rgb leds.

http://vavdo.com