How much does it cost to have a rabbit neutered?

The best age for neutering is when the rabbits testicles descend at around 3-5 months (depending on breed).

AS to cost, it depends where you go. It is less expensive to neuter than to spay a female rabbit though. The cost can range from £30 ($50) up to around £50 ($100). Pick the vet with the most experience, not the cheapest one...