Do you have experience as a staffer, or recruiter? Are you aware that when on call, you can be getting phone calls at any time of the day or night, and I mean that literally. If a nurse is scheduled, and then does not show or calls in sick, it will be your responsibility to find a replacement for that job right away.
Your pay is normally going to be higher working in the role of the LPN for an agency, not as a recruiter/staffing person.
And if the job has been posted for awhile, why was it not already filled?