It might be sick. You might want to go to the vet and get it a checkup. Or was it like that since you bought it? It might just look like it has watery eyes. Either way I'd get it to the vet. Just to make sure it isn't sick.
There are lots of breeders that believe all rabbits carry diseases, although there is one disease that causes watery eyes, it is call Pasteurella. You can take your rabbit to a vet and determine if this is the cause. Usually a treatment of antibodics will clear it right up and they will be back to normal.