Firat Demirhan, 29, from Hagen, near Dortmund, just wanted to add some extra detail to his car ad so that potential buyers wouldn't think there was anything wrong with it.
But thousands across Germany read Demirhan's nearly 10-page ad/memoir on impending parenthood, relationships and car-owning dreams, prompting national media to rush to Hagen to cover the story.
Job offers from advertising agencies and book deals have also since come his way.
Demirhan told The Local all he was really trying to do was to tell potential buyers he wasn't selling the car because he wanted to, but because he had to. The ad turned into a story many people could identify with, he said.
“I just tried to describe how great the car was, and how many nice memories I associated with it, and show the buyer the Tigra's sentimental value and my close relationship with it.
"I think that just lots of readers were able to identify with us (Demirhan and his girlfriend). Almost everyone drives a car and has a girlfriend.
"The problems we have in our relationship are almost the same: men and cars, women and shoes.”
As to whether he might take on any of the job offers coming at him from advertising agencies, he isn't quite clear.
“I feel very honored, especially because I really do think I'm not a writer, just a normal young man, who described his chaotic life with passion. Although it seems readers really like that.”
An excerpt from the ad:
“She rolled her eyes when I asked her my first question, who the (pregnancy) test belonged to. At my second question - who the father was - she rolled her eyes and her head at the same time (it looked really crazy).
Anyway, the Tigra has to go, because it's apparently too much effort to put the baby in the backseat with only three doors.
I agreed with her, but suggested that while the car isn't a family car, people sitting in the back seat can be up to 1.60 m tall, and that should easily buy us a few years' time. She became furious and tried to hit me.
I gave up because I was to lazy to run away, and I wondered if she would also react the same way during fights with our future kid around. So now I'm sitting here and have to advertise my car, while my rolypoly girlfriend gets herself ready for a (50) Shades of Grey showing."
Bidding for Demirhan's car ends Thursday next week. He's not so sure what his plans are after that. For now, he's busy fielding media requests and hundreds of reader questions.
“Now the foreign media are also starting to report about me and all want to speak to me too. A reader wrote me on Ebay, that a Japanese daily reported about me. Can you believe it?”