Hi, 729 20th Ave N, South Saint Paul is TNAS which stands for Temporaty not available for showings. Ussually is because there is an offer since this property is a short sale / subject to bank approval.
Also TNAS is done when an offer has been submited to the lender (signed by Home Owner) and there are too much activity (showings).
It was taken off the market on February 17th and listing price was $122,900 from $169,900 on November 25th, 2009.
Buying a Short sale requries a lot of patience due to the time it ussualy takes to approved and close one.