Dishonest Landlord

[mybday]

Me and three girls rent have a monthly rental agreement at our current place of living. For about two months now we have been getting letters for the landlord from the loan company and now we got a document taped tto our door that said our house would be auctioned off. We asked our land lord and he said everything is fine and not to worry he is just trying to get a better loan. We googled the house today and he is selling it over the internet and I also saw that it is up for auction. He hasn't paid on the loan since March and we don't want to pay him another cent if somebody else is going to buy it and kick us out. How long can we live there with out paying rent? Will this be illegal? What happens with our security deposit?