If you really want to sell your house, I highly recommend getting a Realtor. They only get paid if you sell, and what you are paying for is advertising.
I have two friend's that have been trying to sell their homes in this market without a realtor. The first couple has had no luck, even though they keep dropping the asking price. If you don't get any foot traffic, you aren't going to get any offers. Many realtor's won't show For Sale by Owner homes, so that closes you off to a large segment of the buying population. My other friend originally had it up for offer with a realtor but after no movement for 4 months, decided to just put a For Sale By owner sign in her yard and see what happens. She got an offer, but the lady is having a hard time finding a loan.