You’d have to know much more than that description relates. However, it’s probably not worth anywhere near $9,000. It has a set of dual Kadron carbs, but that’s all that is shown, no interior pictures, no side shots, etc.
There are MANY factors to consider when buying these kit cars: Who built it? What kit manufacturer is it? Front (Ford/GM) or rear engine (VW)? Quality of the build? New or just cleaned-up parts? How is it titled? (VERY important), ad infinitum!
The going rate for a VW based TD replica ranges from near $1,000 to the mid $6,000 range for a first rate built of a high quality manufacturer with a correct title. It all depends on many factors.
My advice is to never buy sight unseen. Inspect the car in person!!! If you don’t know much about cars, bring a person that does.