Tell him to send his mate the cheque, then said mate can bring the cash round.
My understanding was that TCs were “like cash.” Is it possible that a bank teller would accept a TC and immediately credit you, and then reverse the payment when they were found to be forgeries at a later date?
It may be legit, but even if the scam isn’t immediately obvious I’m fast coming to the conclusion that any transaction that includes “my representative” is dodge city. Ditto non-standard payment methods that people aren’t generally familiar with.
The other shibboleth is that people who are in the UK but working away don’t generally say things like “your price is considerable, I hope to read from you soon.”