Scammer

This guy tried to buy a phone off me through Gumtree and tried to show me a fake transaction of a bank transfer. He's 5f10 bulky build, ginger beard and has an Irish accent. Where should I report him? Also just for you guys to be wary.

It looks like he tries this 10 times a day and hopes for one or two to work. Absolute scum

Edit: I really was almost convinced. This guy is a pro. If it was someone older im pretty sure they'd belive him