Porcelain Doll

From my research, I believe her to be a Seymour Mann doll that was given to me as a child. Sadly, I can't find any markings or tags, and for some reason, there is no box, so I'm merely giving my best educated guess. Her clothes are in perfect condition, and she has no smudges or scratches that I'm aware of. The only thing is her hair has gotten a bit messed up from keeping her in a storage box. I am aware that the market is flooded, and I'm just trying to make a little extra money to survive, so I'm attempting to sell her for $50, but will take the highest someone is willing to pay for her. If anyone happens to have more in-depth knowledge about this doll, I would really appreciate it.