For Sale By Owner!?

So what is the big deal with using an agent, they do take 6 percent. But they spend a lot of that percentage on marketing your home, which you would have to do. I'am not an agent but I think it just stupid not to use them. Could anyone give me some good reasons not to!!For Sale By Owner!?
I use them myself....why not let someone else do the work with showing the house and all of the marketing? Plus an agent knows the laws and it is a legal contract when they do it and if you do it yourself there could be problems with the legality of the contract. why mess with all of that stuff? it is much easier to go with an agent.For Sale By Owner!?
6% of $250,000.00 is $15,000.00. How much marketing could you do with $15k? oh and I'm not saying it's a good idea to FSBO - just answering your question, specifically.
The truest answer I can think of is that there are a lot of cheap people out there, but they do learn their lesson the hard way. It isn't even just about the cost of marketing and advertising, because a lot of times an agent's office offsets those costs, bit it is the time it consumes as well. Being available for appointment viewings, open houses, dealing with nosey neighbors who just want to see how you decorated your house, etc. Realtors do offer a service, and most of them in todays market don't charge the full 6% that they can. There are many agents who charge a flat fee of 2% or 3%. And they usually have to split that with the agen who represents the buyer and offers the bid. So many variables, and so many cheap people. Statistically, most of the FSBO people find it to be unsucessful, and end up listing after they have failed miserably.