We can’t really answer questions on prices. They are too specific to your region, and to your individual vet. The best thing would be to take her into the vet for a check-up. You will need an appointment before she is spayed anyways. Ask the vet there about what he/she recommends in terms of blood work, etc… And then they can give you a procedure cost estimate. One thing tho, make sure that she will be given pain meds to take at home. Vets will usually give a long-term pain med injection, but you’ll need something for the couple days afterwards also.
When you call to make your check-up appointment, make sure you mention that you are interested in having your female rabbit spayed and would like to have her seen by the vet before scheduling the surgery. Double-check that your vet DOES spay FEMALE rabbits! Some cat/dog vets will “see” rabbits, but don’t spay or neuter them. Make sure that the vet is able to spay her before scheduling an appointment! If not, you’ll need to find a different vet.