One of the things about selling through a Realtor is all of the tools and resources they have. A lot of buyers trust them because they can be certain that the Realtor knows what they are doing and it is an easy first place to start when looking for a home.
If you can give yourself a professional appearance, though, and make it look like you really know what you are doing then you will have that plus on top of actually caring about if and when your property actually sells.
Some sellers don't put a lot into their marketing to make themselves look professional because they want to get the most money possible out of their sale. If you are going to sell without a Realtor, though, it's pretty important to put more into your marketing. By advertising you make yourself easier to access and you also give more assurance to buyers that you know what you are doing.
Some ways to give yourself a professional appearance are through newspaper ads and yard signs. Instead of just putting a classified ad saying that you have a house for sale it is good to pay for one of the ads in the section like the Realtors have advertising that you have houses for sale. You can also buy customized yard signs instead of just buying a "House For Sale" sign at your local market. There are some sign websites that have some nice-looking signs. Two of them that I have found are: http://designsthatsell.biz/ and http://realestatesigns.com/
I really like Designs that Sell because they have such a huge variety and they also help you with your fliers, business cards, newspaper ads, etc, so that you have a professional matching theme for all of your marketing materials.
What are some other things that people on this forum do to make themselves look more professional and also more accessible to buyers?