Since you are buying another rental you can avoid depreciation recapture and capital gains by doing a 10-31 exchange, but yes, the realtor fees are rather...inflated for the work.
Can you list it on redfin? Or, do a FSBO and hire a person off angieslist to just show the place. Not even a real estate agent, but a property manager. Not sure that's legal, but worth a look. You would handle paperwork but the PM would just act as your assistant for the purpose of unlocking the door and locking it back up when people leave after tours.
I too am trying to figure out the best ways to avoid realtor fees when selling. Luckily I can do FSBO but the buyer will likely use an agent so I'm still paying 3%. Plus there are listing agents that charge only 1%. That's the thing about houses, when you own them, people know you have money and they come out of the woodwork to get some of it. I mean $400 for a home inspection, 2.5 hours of work? lol