I think your numbers might be conservative. 60k is a low intro-level salary for most metro areas and many recruiters wouldn't bother. Finding intro-level programmers is relatively easy so the burden of proof and stakes are high for the recruiter. It's a gamble and generally not worth his or her reputation.
I was indeed choosing a conservative number so there wouldn't be much of a counterargument about the 10k value aspect. My point was mainly that 10k for a 6 month vested tech hire is something other tech companies pay to non employees.
