Job looks interesting, what salary range are they offering?
Seriously, in IT, if the job advertrecruiter doesn't have a salary range then it's either below market rates, OR its an imaginary job!
If the agent asks about your salary expectations, confidently ask for $5k more than you think you are worth. If the agent goes quiet, and doesn't sound so keen to talk to you, then you are probably worth what you expected. If they keep talking, next agent, add another $5k till your phone goes quiet.