First, consult the speaker reimbursement policy to determine what can be offered to the speaker.  Secondly, ask the speaker what their usual honorarium is.  If you have questions about the amount, email the Conference Committee Chairs (NJLA.Conference@gmail.com) BEFORE you confirm.  The Conference Committee has a good idea of appropriate ranges.  And, if the amount is higher than we would like, you can always ask if they will negotiate, or if they will consider offering more than one presentation while they are at the conference.  We have had speakers agree to reduce their price because they are pleased to be by the ocean or they have family on the East Coast.  It never hurts to ask.