Ok nevermind I did not know that Hozer sold these carts. Really should have read the translation from German to English with google first.
"Quadrun of Hozer video Games. The original Quadrun of Atari gave it only over the fan club and is extremely rare. Here I offer an affordable version of Hozer. The play is natural correct. The condition of the two stickers is good. The dispatch takes place as stably packed and insured package. No warranty, cancelling, conversion, money back, etc. there private sales. The dispatch takes place on risk of the buyer. A self-service is naturally possible. I answer questions gladly. For all further I refer to my me side."
Figured at first it was real with a starting bid of 50..