Need Help - Is this a good deal? If So what is the offer?

[Danie Glee]

2 bed 1 bath 700 sq ft house - with unfinished basement -  built in 1930 on .25 acres inside city limits, fully fenced with chainlink

Absentee owner purchased in 2004 for $55,250

Unpaid balance $37,086

Home in default for $6561 and going to auction in September.

Tax assessed value $80,000 (50K of that in the land itself)

Zestimate $103 370

Needs a new roof - can't get in to look, but I'm sure its a fixer.

Although I could, I don't want to purchase it outright. What kind of deal could I make with the current owner?