A friend of mine was asked of his expected salary during a just concluded interview he responded by saying 210K after a lot of persuasion he agreed he can accept 160K. After the interview he ran into a classmate of his who works in same company and receives a salary of 200K (assuming same level of skills and same position) . What can he do to get the 200K at least before the offer letter is handed over to him or after the offer letter is handed over to him? Thanks.him or after the offer letter is handed over to him? Thanks.

First of all, the whole of Nairaland knows that you are the one who wants to re-negotiate you pay and not "a friend of mine".
Thats by the way, I think you should just take the 160k offer and forget about your friend's pay.
I dont think you can get the 200k for now, maybe later on in the job you can request them to pay 200k,that is after u have proved your worth to them.
Dont judge urself by what others earn. If the pay is commensurate with what you do, be content

did you ask if this guy that is getting 40k more has been with the company for sometime.Pay rise does not always follow job promotion,sometimes a company will increase the salary of certain employees despite no promotion who have performed well in their current job .