Ahhh, a bubblecut, then. Sorry to say, that means she's probably worth a little less, depending on the hair color. If she's a redhead ("titian" in Mattel speak) she'll be more desirable. Sandi has a couple on her site with the boxes listed for $300-$350, which is probably about the top of the range you could expect to get. I have a brunette myself that I love, but they're just not as desirable as the ponytails.
I'm curious if you've had this doll or just ran across it? I love a good vintage find story.