Should I pay Realtor 5% to rent out my SFR? or post it online myself?

[Andy Kaye]

I am trying to rent out my SFR for $3000 right now. My plan was to take pictures and post it on Postlets (which in turn posts it on Zillow, Triulia, Craigslist, etc) and do the screening myself

However, my Realtor kept saying that he can get better results because he has the ability to post it on MLS. He wants to charge a fee of 5% of my 1 year lease, which is $1800. He said $900 will goto the buyers agent and $900 will goto him.

Is my Realtor BSing me? does getting a rental listed on MLS really make a difference?