I also raise and sell lop-eared rabbits.  Usually babies available May thru October.  I raise my rabbits in outdoor cages so they are climatized.  First litter for 2012 due mid April. Babies will be ready to go mid May.  
Babies sell for $10 each, bred does for $30.  I have a seal point siamese buck and a broken black buck.  My babies come in brown, black, broken black, broken brown, multi brown/tan/white, chocolate point and cream with a tan nose and ears.