Google "flat fee MLS" to find someone that will put it in the MLS for $300-500. To do this, you have to agree to pay a commission to a buyers agent, but at least you can keep half the normal commission. Note that not all areas have brokers that will list flat fee.
If there's no FF MLS in your area, an out of town FF company can get you on realtor.com for $99. And you can list on zillow for free.