Find farms for sale by acreage by using the search filtering options on land and farm classifieds sites, such as LandsOfAmerica.com, LandAndFarm.com and LandWatch.com, to specify your desired number of acres. Auction sites such as eBay.com also feature acreage filtering options as well as other search tools.
When searching for farmland for sale on LandsOfAmerica.com, you can access the acreage search tools by clicking on the Advanced Land Search link on the main navigation bar, as of March 2015. This page contains options to specify both a minimum and maximum listed acreage, which filters all search results to only show those that fall within that range. Other search options include price range, property type and listing type, such as auctions or direct sales. Each listing on the site contains pictures of the property and a description of the land's size and features.
Listings for land for sale on eBay.com also contain pictures of the property, with some sellers including in-person photos and others offering either renderings or satellite images. Access the acreage search tools by clicking on the Acreage option from the filter choices on the left options bar. Other filtering choices include land type, land location, condition and zoning type.