You say she has allergies – has she been tested as being allergic to THEM though? Or is it their urine or hay (the two most common culprits)? There are ways to help if it’s not their fur, to at least give her time to find good homes anyway.
Make up a set of questions you want them to know. How many rabbits have they had? Where did they live? What would be an example of the diet they plan to give them? What sort of setup do they think they will have for them? How often will the rabbits be let out to play? etc
Charge a rehome fee, just to weed out the people looking for free pets. If you find a home that you LOVE and think will take excellent care of them, you can waive the fee. The fee should be small, so it doesn’t look like you’re selling them, but large enough to make them not tempting snake food. People will lie to your face to get free snake food and such and claim to give them all sorts of stuff. There are people who take their children to pretend to fawn over animals that are “free to good home” and promise all sorts of care, then use them as bait animals in fighting rings too. Free is just a bad idea.
You can also ask for references. If they have pets already, they should be able to reference their vet.