External recruiter vacation pay

The recruiter has listed on their site many benefits like vacation pay similar to a full time position. I have just been told the company I’ve been interviewing for wants to hire me. This is my first time working with an external recruiter recently out of college, and due to my naiveness ended up with a low range from what was advertised. (check out this thread https://www.techrepublic.com/forum/discussions/102-341744?tag=mantle_skin;content)

So my question is, they haven’t mentioned benefits at all, can this be negotiated, if so, how? Should I wait for the paperwork to come in first before I even discuss negotiating in that area?