"It's all about the best retirement." A wise man once told me this, and it's very true. In addition to salary, you need to ask questions such as:
-What's my schedule?
-What are my medical benefits, costs, and deductibles?
-Defined benefit or defined contribution?
-If DB, what's my multiplier and years of service, and is OT factored in?
-What are the dept's leave policies?
-Compensation for on the job injuries?
-Union?
-Pay progression?
A word on pay progression - One place may pay quite a bit more than the next, but their progression may be very poor. Also, if their starting salary is high, that may be to compensate for their shortcomings, such as poor working conditions, poor retirement, lousy medical, etc.
Having said that, I've worked in three places:
NYC - the privates get from around 19/hr to 23/hr as ALS, 10-13 BLS IIRC. The hospitals pay from 25/hr to 35/hr ALS, around 15-24 BLS. Here's FDNY's current pay scale:
http://www.nyc.gov/html/fdny/html/community/ems_salary_benefits_042607.shtml
-Charleston SC, medics 15/hr in the hospitals, 38k-68k yearly on a 56 hour week municipal 911. BLS 11/hr, around 25k starting, up to 40k or so muni.
Northern VA - private ALS 13-17/hr, BLS 9-14/hr. Fire based ALS 55k-100k, FF/EMT 48k-80k. Fire based jobs are either a typical 56 hour week, and some are 48 hours.