I am also wondering the same thing. Since he pushed the domain back to you, it means you still own the domain... no? And why is it a scam if you still own your domain?
i dun have the domain. i pushed to him first to confirm im legit. he repushed to me because he got paypal problem. the next day, he pm me and asked me to push to him again. which i did. and no replies from him anymore
Hmm, you could do a search for articles on how "Not" to get your site banned from search engines and just do everything it tells you not to do on your old domain name lol. Is just a suggestion, Not sure if it will work or not.