If the owner replies with a counter offer, do you want us to notify you?
If subject to finance, how many days would you like?
If subject to building and pest, how many days would you like?
or
I/We acknowledge that this is not a legally binding document or a contract. It merely sets out the proposed terms on which I/we may be prepared to proceed further to prepare a formal contract. In no way does this document or anything done during the discussions resulting from this document bind me/us or the seller to sign any formal contract documents to purchase the property.