As already suggested use BACS the bank electronic transfer system, although you have to give him your account and sort code.
Don't do cash thing, can you really spot a forged Euro from a real one ? and who is going to pick up the commission charges on that amount ?
I hope your not exporting a Pacific 22, they are a national treasure and I am sure you need a licence for that sort of thing
oh and remember the trouble Matrix-Churchill got into for supply military hardware abroad