Sold without a realtor? No, the home I have sold wasn't worth enough where going with a flat rate broker would have saved me any money. It would have been pretty close to break even so decided to go the traditional route. We did almost try to sell ourselves with just using a brokerage to list the property on the MLS (<$1000), but we lived out of state at the time, my travelling for work and the wife being 4 hours away from the property in question justified the expense for us. That being said, i'd wager my situation is a far cry for the typical home owners.
Still need a brokerage, but you can literally get them to list it on the MLS for very few dollars (<$1000). Meaning anybody with an internet connection can show it. If you don't want it on the MLS and just want it on zillow and a few other sites you can do that for around $100. Putting it on the MLS means it'll pop up everywhere though.
In this market, i don't think you'd have any issues getting the buyer to pay their agent. Or you could pay it and save 50%, minus the cost of listing the home on the MLS. The demand is so huge I'm pretty sure you'd get buyers bending over backwards to pay their own realtors.
Lets say you pay it, at 500k home sale saving 3% puts an extra $15000 in your pocket minus $1000 if you decide to have a brokerage put it on the MLS for you. I do hear realtors don't like this though because the buying realtor winds up doing the work for two people

. He's pretty much printing out twice as many papers more than likely. I believe it, but it is what it is.