Please see all the other questions already answered on Trulia regarding these types of foreclosure postings by RealtyTrac and other data suppliers. Not an accuratre depiction of the situation.
The owner of that property may be in litigation or has a judgement against them for $5,100. All it means is that there is court action pending that may put a $5,100 lien against the property. Will that property really be foreclosed upon and sold at Sheriff's Sale? I doubt it.
PLEASE SEARCH TRULIA FOR OTHER SIMILAR ANSWERS. THERE IS A LOT OF GOOD INFORMATION HERE ON TRULIA.com THAT WILL HELP YOU STOP WASTING YOUR TIME ON THOSE AMBIGUOUS FORECLOSURE POSTINGS.
You are better off finding a good Realtor who can find you actual, available REO properties.
Good luck in your future real estate endeavors.
All the best,
Larry Lichtman, CNE
REALTOR, Property Manager
Cell/Text: (267) 254-7994