We get a number of questions like this which basically boil down to the asker not knowing what to negotiate or when to negotiate it.
If we had a comprehensive question and answer that detailed when it's good to negotiate and why it's good to negotiate these things, would this be on topic and beneficial to workplace to point these types of users at?
Bad answers to this question:
You should negotiate on the 25th of June
You should negotiate 2 weeks after moving house
Good answers to this would be a long the line of:
It's best to negotiate when you have a real need for something different to what you are being offered. For example if the pay they are offering you is below what you need to pay rent then it is best to negotiate this value.
You should not try to negotiate just for the sake of wanting more, trying to get things you don't really need can come across as greedy, and negotiating for far more than you need can result in you not even getting considered
Of course these are just examples and I imagine that others can come up with additional points.
My question still stands: Would a canonical Q&A of when and why you should negotiate help the workplace?
If this is not fit for the main site, would having a question of that ilk be useful to have here on meta to point people to instead?