Matt,
Few points. I actually started a service assisting people people like yourself in finding help to sell properties without agents. I am talking about help in setting the price for the house, understanding cost/benefit of potential renovation, taking pictures, staging, marketing, open houses, documentation, negotiation and so on. I am in very beginning of the process and might not have many vendors in your area, but would be happy to work with you for free ( in terms of my fees) to promote the service. The foundation of the service is that there is a third way in selling. I call it uber for the home sale: there are plenty of people that can help and you do not need to pey them %.
Other points are:
Saving 6% is huge for your return. Period. If you planning to be an investor this is probably one of the smartest moves you can do: you will not only save money but will learn a bunch of things about the market along the way.
The notion that FSBO people gets lower prices is a myth cultivated by the industry. In fact the independent academic research shows exact opposite: agents will depres your price. I can send you the link.
Blacklisting: baloney. However, you will need to decide if you are willing to pay buying agent commission. If you plan to, you will have to let them know about it and probably have a letter to this effect ready. I have language for such commitment on my site. If you want to try to sell directly to the buyers and capture buyers 3% you should advertise it in your property listings so the buyers call you, not the agent. You probably would need to be more proactive in promoting your listing on Zillow and in physically world in your area. There are ways and people to do this for you at very reasonable cost.
As I said I would be glad to help. There is very little to lose by trying to sell on your own. I will tell you more: if you work with me, spend money with my vendors and are not able to sell, I would probably be able to find a listing agent who will reimburse some of your expencess to get your listing.