Craigslist transaction went south...

First of all I am impressed with the number of upstanding and ethical people on this site who have said to just give him his money back! This is why I would never sell electronics on Craigslist although I'll bet nine out of ten transactions are fine! It's that tenth one that is not worth it! Personally if you are certain that the unit worked fine when you sold it I would tell him so and refuse any further correspondence! I have been to small claims court once on a matter of principle and it was a real hassle! (BTW I lost even though I was certain I was in the right!) As someone already suggested few people would do that for $120 unless they really felt that they had been scammed. I suspect he is either a scammer or he has hooked this unit up incorrectly somehow! I have heard of the scam where people buy a new unit identical to the one that is not working and then try to return their broken unit in its place! Do you happen to have a record of the serial number. Probably not but if so and if you really want to refund his money I would make it clear to him that you will do so only if he returns the unit you sold him!