Handed fake money for iphone. Guy is gone. What do I do?

I basically sold his phone on Facebook marketplace and it was a week ago, the guy handed me cash. It looks exactly like real money, but the bank later said it wasn’t real, it didn’t say “for motion pictures only” or anything like that. It was a good set of fakes. Really really good. I did the transaction at my apartment complex and they have security footage, but realistically is it gonna do anything? The guy is gone, I found his account with my second Facebook account and even if they do catch him, it would be hard to prove that he made the fakes. Any chance that this dude is brought to justice, or I get some of my money back?