Direct adverting through this site is available if you are a larger business like a coal stove manufacturer. Contact me for details.
If you are a smaller business Google Adwords is the most cost effective way to advertise here. If you are unfamiliar Adsense allows you to target ads to people in your area and it's important that you use that feature. If you deliver coal in New Jersey there is no sense paying for ads being served to people in Pennsylvania. You can also target your ads to specific sites such as this one, something else that can be important to serve the most relevant audience.
Google usually offers free credit, this one as of this posting is for $75 if you spend $25.