I don't work for Trulia, but the public records on this property do indicate that there was a mortgage on it in August 2000 for $99,000 (which would jibe with a 105K purchase price), and the property was mortgaged in June 2004 for $198,100 (which would jibe with a 205K purchase price). I'd suggest checking the Cook County Recorder of Deeds the next time you think there is a discrepancy in a public record that you're researching.
Broker Associate, Sudler Sotheby's International Realty
Maybe they were looking at the price they mortgaged. They just didnt consider what the person was putting down. I know this may not be right, but I have seen people make mistakes like this in the past when looking at sold properties.