How to tell if someone is a fake buyer?

so i put my playstation on sale the other on gumtree, 3 days later i got an email from a guy saying he is interested he gave me his paypal and said that he would give me an extra �60 for delivery which sounds a bit dodgy and he is writing in slang eg: instead of you putting "u". What do you think i should do, send him a request for the money and if he sends me it then sell him the playstation or ignore him ?