Since you collect vintage then you know different "eras" and "models" of Barbies are more prized and valuable than others. My very first dolls were from the late '60s -- the Living Barbie and another one (I can't quite recall what they're called, color-something) -- which are pretty highly prized today. Unfortunately, every Barbie I owned was burned to a crisp in an automobile fire when I was 5. The Barbies I acquired after that (and the ones I still have) are from the early '70s which is an era that isn't
prized by collectors (unless things have changed, I don't keep up with it anymore), since that is when Mattel was going through financial difficulties and the quality of the dolls and clothes was far lower -- such as the Malibu dolls with the tanned skin. Of course, my dolls are worth nothing, anyway, because they're in such un-pristine condition.
But their sentimental value is priceless, of course. Especially my Malibu Barbie -- that is the first one I got after the fire, my beloved grandma bought it for me because I was on my way to see her when the car caught on fire and she felt sorry for me without my dolls! Somewhere along the way I acquired a much older Barbie doll -- a #3, I think. I don't know where I got her, since she is before my time. She's in pretty good shape, too.
And some of those vintage outfits are really, really pricey, too, especially if they're in mint condition.
I see you posted some photos on the other thread --I'm dying to see them, but I'll have to wait until I'm at work tomorrow! I have a Mac computer at home, and for some reason some pictures don't come through on it -- all I get are little blue boxes with question marks.