Mm, I want to say around 600 euro (too long ago to remember now) but there's a back story to it as well - the seller stated it was one of Dwight's originals, (technically, it wasn't, but it was worn by him in the pilot episode and 1st season) so he, and his fan site's webmaster called it "absolutely fake". (Which had me wondering, "Okay, who paints these?" Searches turned up nothing.)
After a lot of back and forth with the seller, they agreed it was a show worn stunt jacket. At this point, I'm asking myself, "Why doesn't anyone know the facts about these?!"
So I began my study out of curiosity, and matched the auctioned jacket to the pilot (months after it sold). I guess I studied a little too much, well, because...
Dwight's stated in a podcast years ago he won't give his jackets away. He did donate #3 to Ft. Bragg for a Vietnam unit, but it sat in a storage closet for ten years as they never built what they were supposed to, so he had them send it back.
The original artist's name was Pauline Annon, but she passed away in the 80's. That's about all I know.