2 black Maine Coon cats- 4 year old sisters- need a good home in Wilmington, Delaware For Sale

I have two black cats that are 4 years old- born in my back yard- which I'm allergic to and need to find a new home for them. I'd like them to be adopted together since they've been together their whole lives.
One is solid black and the other is black with a white spot on her chest. They are very affectionate and great pets, although they can be shy with people they don't know.
They are up to date on their shots, and both have been neutered.