Identification for six Barbie dolls

Six Barbie dolls I need help in identifying. From left to right: doll in orange jumpsuit, gold jumpsuit, pink dress all dated 1966; doll in red dress dated 1975; doll on far right in red floral dress dated 1979 with 1966 beneath that date. Clothes not necessarily Barbie clothes. As you may notice, dolls having a "bad hair day". My daughter played with the dolls instead of looking at them on a shelf. Where can I find value of dolls? Thank you. Linda

Hi Linda -
I do not recognize any of these - none of them are vintage Barbie dolls - I believe most if not all are newer "superstar" era Barbie dolls and have very little, if any, value.
The 1966 only indicates the date the twist 'n turn waist was patented and has no relation to the manufacture date of the doll.
Suzanne