Very good question. It depends.
Read the link below. The average price per square foot for sold property has declined 14.5% in the last year, over one percent per month.
The number of sales has declined 82.4% (slow market).
Just looking at these statistics, assuming they are representative of your situation, I would recommend that you list with a Realtor....and here is why:
Most owners selling without professional representation are trying to save the cost of commission. I don't know your rates, but let's guess at 7%. Most owners will pay the buyer's agent to handle both sides of the transaction, 3.5%, so they are trying to save 3.5% by selling without professional representation.
1. Most owners who try to sell on their own eventually list with a Realtor (over 80% according to a NAR survey).
2. While you are trying to sell on your own, your property is loosing value at the rate of 1.2% per month. That means if it takes you more than three months to sell, you'd be better off hiring a Realtor. But what if you try it for two months and no offers...that cost you (based on the median price) $1300 per month, (1.2% of $112,000), or $2600 in two months, then you hire a Realtor, it takes another month or two....that 's a lot of money to loose (unless the money doesn't matter, you just want to sell without professional representation because you want to on principle).