The pressurized flight suits were a post-1986 innovation. The blue flight suits were worn by the crew after the first four “experimental” flights until the Challenger disaster. I don’t know that this suit actually flew, but you’re right — the paperwork gives it the $1K value. An historian would argue for a much higher value.
I wasn’t sure about pre-Challenger (before my time) but I knew the orange pressure suits have been standard for a while. I’m sure that Ms. Ride’s flight suit has historical value well above the list price.