US Marshall Auction with tax lien

[Dee Xixi]

I am the highest bidder on a US Marshall auction but I did not really do my research until after the auction. I found out the owner havent pay taxes since 2003 and it might be possible of other lien against the property. The scary thing I will receive a quit claim deed at closing.

My question is what are my options either to pull out of the deal without losing my 5% down deposit or have anyone successful fight with a city to get a break for the back taxes. Or any workeable scenario.

Please advised!!!