2 5mo female kittens

We took on two female kittens that are about 5months old.
Neighbors left them cause they couldn’t take them with.
Unfortunately I don’t do well with cats, Allergies are kicking my butt.
Both are amazing with my.
4 year old.
I’m asking a rehoming of $20 per cat so I know they will be taken by someone who’s going to love them.
Both are about the age to get fixed.
I was going to try to get it done but I really just can’t keep sticking it out being allergic to them.
I’d really like to keep them together as they have always had each other.