I made a post a while ago about the point at which Barbie began to actively market collectibles as opposed to just playline dolls for children.
At the time I mentioned the first Dolls of the World line in 1980 and the debut of Barbie Bazaar in 1988, but in hindsight I missed some pretty important dolls in the history.
1985's Le Nouveau Theatre de la Mode Barbie, designed in collaboration with BillyBoy* was created to commemorate the first Barbie, at the time 26 years old. It's hard to argue that this was intended to be a playline doll for children - by modern standards we would definitely call this a collectible.
But it's Blue Rhapsody (1986) that is more widely considered to be the first Barbie collectible. She was the first Porcelain doll and was advertised as being the first in the "Porcelain Treasures collection".
She looks sort of quaint in a way I can't quite put my finger on.
This is probably the closest answer to my original question - but for the sake of completeness, I have seen some people put it later still, with the Bob Mackie Gold Barbie in 1990.
Charming though she is, I think we can confidently eliminate her from contention as she came after both of the dolls listed above, after the debut of the Holiday Barbie line, and well after the debut of Collectors Magazine Barbie Bazaar.













