Saw a few similar posts for MX13 across this and the other civil service thread. I assume you are considering a move into civil service because your salary range will be made known once you receive your salary letter.

I understand pay is definitely an important consideration when choosing a job but I suggest not to be overly fixated by it. The civil service has a very structured pay regime in place, there is a formula to calculate how much a person gets based on education, experience, parity to other civil servants, and other factors, and as such there isn't really any room for negotiation. So, secure the offer, and then decide if you want it.