A. Low Cost:
If it's as hot as you say, I'd do the following:
i. Pre-Market: Send out letters to neighbors that you're selling so they can tell their circles; List on Zillow as MMM (ignore the agents). You could pay 0% commission.
ii. Active: List on MLS Flat Fee:
http://www.dcurbanmom.com/jforum/posts/list/475296.page#7298461
B. Mid
i. Limited Services/Flat-fee agent. I usually perform services for friends and family at $5k. With a limited services like the one you described, it shouldn't be a problem getting an agent to ink the deal.
C. "High"
i. 1% flat fee
RedFin - I like them, but they're discriminated against. There are plenty of others.