Here is an example of the kind of sites that I prefer: landandfarm.com Although these sites are not free, they charge no more than $40 a month for a basic listing package which is actually cheaper than eBay and tends to fetch higher prices as eBay buyers are typically deal hunters. These sites have easy to fill out forms requesting all the basic information a buyer will want to know prior to acquiring the land. They have easy features for uploading pictures and inputting maps. Don't expect the property to sell within the first month. However you should get some inquiries that first month and if you don't you will want to edit and adjust your advertisement or switch aggregator sites. Once you have a link to the property you can start sharing it on social media sites like Facebook and Twitter. You just never know if a friend of a friend might be in the market for your property.
Market for Land is Less Active – The market for existing homes is almost always more vibrant than the land market. There simply are fewer numbers of buyers for vacant land than consumers looking for homes. Start marketing a new home listing and a new lot listing when both are desirable and priced well, and you generally can expect fewer contacts about the new lot listing.