Sphero Bolt
25 CHF
Sphero BB-9E
RARE!!! Around 80 CHF (quite expensive!)
Sphero Ollie Darkside
RARE!!! Around 50 CHF
Sphero R2-Q5
INCREDIBLY RARE!!! Around 300 CHF (INCREDIBLY EXPENSIVE)
Anki Overdrive
Around 70 CHF (fair price)