As I try to explain why it`s not complicated and dead offers are dead, but can easily lead to ongoing negotiations and agreements, including the use of modifications to the original sheet of paper, I have to point out a few nuances that crossed my mind: this is common for real estate transactions that involve a lease with an option to purchase. The owner of the property rents the property to the tenant with the possibility of acquiring the property at a fixed price at a later date. Such an offer to sell the property to the tenant is irrevocable. Point #2 is also false, while it gives the impression of being true. The clause states that the offer is null and void after the expiry of the period. But as we saw in the example of the bicycle, it is possible to continue working on an agreement, even if this offer has expired, as it has been written.