Have any of you bought or sold a house on your own, without a realtor?

Travis and I are going to sell one of our houses this summer, then later in the year we'll work on finding a new house and selling our other house. Travis hates the idea of giving so much money to a realtor when we could do all the work on our own and not have to pay ~6% to someone. I get stressed out thinking about the whole prospect, whether or not a realtor is involved. When I bought my house I used a realtor and found it helpful because I had no idea what I was doing or what steps I needed to take.

Thoughts? suggestions?