Rehoming Maine Coon Mix (West side)

Looking to rehome this cutie.
His name is Loki.
He is neutered and up to date on shots.
I believe he is a 2-3 years old Maine Coon mix, although I do not have confirmation of his breed.
My ex wasn’t able to take him when we separated, so I kept him.
Unfortunately, he does not get along with other cats.
I have been trying to work this out with my cat, but it’s just not working.
He does do well with big and small dogs (he had a chihuahua and Pit Bull brother).
He was around my 11 year old niece this summer and was fine with her.
He can be a little skittish around people at first, and definitely that aloof cat at times, but once he warms up he is very loveable.
He really needs a home where he is a single cat or maybe has a dog brother, and someone who is willing to give him extra love so he can thrive.
Asking rehoming fee of $100 to ensure he goes to a safe and good home.