Another part of the lease must be the RENEWAL TERM.Often leases will be for a year but AUTOMATICALLY go MONTH-MONTHCheck your lease language and see what it says there. 

They were able to obtain a free 90 day option from you at a fast close all cash discounted price by leading  you to believe that they themselves were going to be the buyer in a no hassle close, and the language of the contract was explained away as required for showing to one of their imaginary all cash investor-buyers.  

It pretty straight forward in the language.

Please excuse grammar and vocabulary errors, English is my second language.  

Most well drafted purchase agreements will include language that can call a default on the purchaser for misrepresentation so be mindful of how you represent yourself when submitting offers. 

The specific language is below and I've included a link to Fannie Mae's site as well.

Also, what language do you use in a sale that gets the same message along... that the seller wants to make it clear that he just doesn't want to make any unnecessary repairs or give credits for obvious upgrades?

It's all in the structure, and legal language. 

Unsafe" is probably language that local C/E uses to refer to Health and Safety Code laws as they relate to their ability to withdraw a Certificate of Occipancy.As you may already know, I've spoken at our state's annual code enforcement conference and follow multiple cities fairly closely.

Sorry Bob that may be a language thing as I am not American.