The average home sold by an agent in 2013 was $40,000 higher than a FSBO listing.
That is a big chunk of change, and much more than the average home sale would pay your agent. PROFITS! It's definitely worth it. Some offices even offers a sell it yourself plan, where we allow you to still try to sell it yourself. You only pay a commission if the Realtor sells it; and truth be told, they usually do!
Your bigger issue is what happens if your home does not sell? I hate to be the bearer of bad news, but you really ought to consider a plan B just in case.
Homes sold by owners without professional representation sell to someone they know 5% of the time, 5% of the time to someone they don't know, and 85% of the time they list with an agent.
Homes that are sold sell on average 16% less than those sold by an agent, which make sense when you are only dealing with 10% of the market.
So interview three Realtors, compare their proposals, run the numbers, then you make the call. Good luck.
If you'd like a referral I have a great agent in that area.