In the Ultra Hair series, there was a brunette doll issued in the US. However, she uses the Superstar sculpt, like the blonde version. In Europe, the Steffie sculpt was used, and her edition size is pretty limited.
When she comes up for sale in NRFB condition, she can sell for $400. Deboxed, and in less than mint condition (mine, for example, is missing her ring and shoes), she can go for much less.
My lovely girl is still in wonderful condition, I think, and has her amazing long and crimped 1990s era hair intact.