Cheap baby pigs, or piglets, can be purchased or adopted through numerous online sites, including Petfinder.org. Many well-known organizations, such as The Humane Society of America and other rescue groups, list available animals for purchase or adoption, including piglets.
To search for piglets on Petfinder.org, click on the Find a Pet to Adopt tab, then input your zip code. In the drop-down menus for Type and Age, input Pig and Baby. All piglets available for adoption are then listed, along with the organizations or individuals selling them. If you'd like to specify the gender of your piglet, you can do so. There are often nominal adoption fees to adopt piglets through these organizations, but it is a cheaper option than going to a pig breeder.