How many homes have you sold before? If you have the experience and feel comfortable managing the transaction start to finish, I'd say go for it.
However, some things my team does that would not be cost efficient for an individual seller are SEO marketing and pro subscriptions. We get your home on as many websites as possible, and pay a good amount of money to make sure your home appears at the top of search results. We're part of an international MLS, so we get eyes on your home from all over the world. We put together a kit of flyers, door hangers and business cards and go door to door to advertise your property. We do professional video tours. Not to mention you have a professional that looks at homes everyday to help you price correctly, which is extremely important if you want to sell your home in the shortest amount of time and for the most money.
Don't forget that 6% isn't set in stone either. I know many top producing agents that would be willing to negotiate. I bet you could probably find an agent that would be willing to stage for you as well.
One time I had buyers that were interested in a home that was listed with an MLS flat fee service. I talked to the seller, and the home was already under contract with another buyer, but he was feeling extremely unhappy with the way the sale was going. Unfortunately, he was under contract so there wasn't much we could do but wait and see if it fell through. He would call me about once a week, asking if my buyers were still interested, and then he'd tell me about what was going on with his transaction. He foolishly signed a 30-day extension. And not once, but twice! No agent in their right mind would allow their seller to sign a 30-day extension, let alone two. This is just one example of how this guy got plowed in the transaction, whereas an experience agent would have better protected his interests. It took him 5 months to close that deal! Also, at least in WA, after a certain period of time, sellers can basically force the buyers to waive their financing contingency! So if financing fell through after that period, seller would keep the earnest money as a remedy. This is just one example (I can think of lots more!) of a tool that sellers without a lot of experience might not be aware of.
One of my teammates took an expired listing from a client that had listed with a flat fee service. After 6 months on the market with the flat fee service, my teammate had it under contract in a week, at the same sales price as the flat fee service.
I sold a home that was listed with a flat fee service. Everything went fine, but that home was on the market for 6 months before it sold. I am not opposed to flat fee services, but from my experience, they always seem to sit on the market longer.
Sorry for the long-winded post. Hope it helps!