A: Appraisers research many sources to obtain information when preparing an appraisal. In Alberta we can use the Online Land Titles System (Spin) to access land transfers and title transfers. We can also access sales data from the MLXChange system (also known as MLS), that the realtors use when listing and selling properties. Other information can be obtained from the City, County, Town, Village, Third-Party Data Providers, Articles, Media, Government Agencies, and such.