There was a sale date for my house. I moved and 2 days before the sale date it was cancelled. The landlord verbally told me since I was able to try to get my house back I could break the lease. Nothing was written. I did move back to my house and now he won't give me my deposit back. Some one told me you were able to break a lease as long as it was within one month?

No, once a lease is signed and paid, it is valid and unless the landlord gave you something in writing, it can not just be broken. who ever told you that had no idea what they were talking about.

Now, if all they want to do is keep the deposit and not sue you for future rents you got off pretty cheap actually. And this was a fairly good deal. So the landlord most likely said you could break the lease but he was going to keep the deposit and not make you pay future rent.

Also a lesson learned, a house is not sold till it actually closes. But then if the buyer backed out, you should have got to keep the down payment they gave, unless it was for some condition, such as loan and so on.