This question is not a duplicate of the linked question.
The asker has a key distinction (which was ignored in the edit to the title which changed the question completely... it seems people only voted as duplicate based on this incorrect title?) not present in the linked question:
- They already verbally accepted an offer from the company they want to negotiate with now.
All the responses in the linked question don't address this at all (in fact some of those responses don't even answer the question themselves...).