I still think she's a Katie doll by Kid Kore.
I had one growing up, and was able to recognize a another one from just her hair while standing twenty feet away. Even from the blurred photos, this still looks like your doll!
They came in at least 24 different outfits. I've yet to find one in the same outfit as the one I had growing up OR the one I found at the flea market.
Her body and arms are made of a hard plastic, her head is vinyl, and her legs are a rubbery plastic and bend.
Look at the shoes on this one:
And here's a "Katie" with a different face:
Alternatively, could she be one of these? They seem a bit small, though.
EDIT: OH! Unless she's the same type of knock-off dolls that I got in a set when I was very small... I always called them "Barbies", but they weren't. Mine all came in Halloween costumes and were packaged with alternate outfits, including a record player. I only have two of the six left, but I would have gotten them around 1994, and I know they made them for quite a while afterwards as I saw them in Ben Franklin for years after getting them. They are quite chubby and the blondes came with crimped hair!