We sold our house and purchased a house FSBO. It was so easy and we saved thousands of dollars.
We made an informatin sheet and put it out in front of the house with a sign, just like the agents do. I was quite capable of telling potential buyers that "this is the dining room", "the furnace is 10 years old", etc. Anyone who gave us a lowball offer was shown the door. It's okay to say no, or counter offer.
We ended up selling the house for $3K less than the asking price, and we were asking $45K more than we paid for it. I think that's pretty good, and with no agent to pay, we got to keep it all.
Do your research, check property tax websites and see what the value of the houses around you are. Go visit any open houses to see what the competition is and price your house accordingly. We knew we could get more for our house based on the improvements we have made, plus we were in a highly desirable area for starter homes.
When buying our new house, we specifically sought out FSBO houses. We made them a very fair, non-insulting offer and they counter offered. We took it. We all met at the Title Company for the closing and had lunch together afterwards. No agent was needed for this at all.
The key ingredient in our sale/purchase was the Title Company. They had everything ready for us, explained the financing, legalities, etc.
Good luck. It's a lot of work, but stay organized (get a notebook and keep the inspection, samples of utilities costs, details of upgrades, etc. and lots of file folders!) and do your homework and you will be successful!