It depends on the quality of the bird and the source— one of my favorite breeders down here charges $50 for 6 month old bird regardless of sex but they’re practically guaranteed to win 1st place in any fair you enter them in.
Poor Sunny I’d be her friend in a heartbeat but yeah, I know what it’s like to have loner birds in your flock; I ended up buying my phoenix hen a mate because she didn’t fit in with the Ameraucanas.