This is a great tip. Earlier in my career I was stuck at a mid-point where I didn't have quite enough experience to get hired by a household-name tech company, and working with third-party recruiters made finding a job easy. Knowing what I know now, I never would have even made it past screening at a lot of companies. They will take a cut of your salary, but they'll also work hard to sell you, as that's the only way they get paid. You are to them what a house is to a realtor, and the market is hot right now.