Your offer, once accepted, will ultimately become a binding sales contract. This sentence identifies the document as being an offer.Prepare the seller's offer on a new purchase agreement form. In California, real estate purchase offers and agreements are typically submitted through a standardized document. The California Purchase Contract is chock-full of deadlines: three days to place a deposit into escrow; 17 days to perform investigations; scheduling utilities. Get a comprehensive understanding of California real estate purchase and sale agreements with our indepth overview and free template.