Wages – it is never an easy subject to talk about, especially before you begin a job! You never know whether you will be overstepping the mark if you try to negotiate a wage, and whether or not it will be detrimental to you being offered the job.
If the salary you are looking for is a long way above the amount the company is offering, it is probably best not to try to negotiate a higher wage. However, it might also be worth considering whether you should, in fact, apply for the job in the first place, because you could well be over qualified.
If you are looking for a slightly higher wage, it is often worth asking if the company will be willing to pay it. This shows confidence, and shows that you know your worth in the market. If applying via a recruiter, you could first ask them for their opinion on the wage.