You are in the car and the listing agent wants a number. The buyer is at work. Your assistant drafted a recap of the showing — the light in the kitchen, the street, the other house they liked on Tuesday. None of that is the offer. The offer is a price, a few terms, and a clock.
A buyer who "needs to think" is often a buyer who cannot find the decision in the message. Your job in writing is to put the choice where a thumb can land on it.
The deadline is a fact, not a feeling
Open with the decision and the time it actually expires. "I need you to choose between offering at the listed figure with the inspection term we discussed, or walking away. The listing agent needs a written offer by four." That is an honest deadline, not a nervous one. If four is theatre, do not write four.
Then the terms that change the deal, in their currency: price, timing, what they are asking the seller to leave or fix, what happens if the inspection finds something. Two or three. The rest of the form is your job.
Name the decision so they are not asked to invent an offer from a mood. "What do you want to do?" is how a showing recap ends. It is not how an offer starts.
Write when they need the terms; call when the clock is minutes
A call, an email, and a briefing do different work. If the other side is waiting on the porch, pick up the phone, then write the four-line record of what they said. If they have an afternoon, write the choice so they can read it twice.
Do not attach the contract and hope. RelayLink does not carry attachments. Describe the document: which form, which blanks you have filled, which term is still theirs. They should be able to say yes or no without opening a packet on a phone in a hallway.
Mark the premises. You assumed they still want this street. You assumed the other house is gone. You assumed they can be at a signing on the date you named. A labelled line gets a correction. A paragraph of enthusiasm does not.
One send, their words, their mailbox
You review the package. The note is yours, in words they would recognise — not a private nickname you use for them in your list. That nickname does not travel.
They do not need an account to receive or reply. A first send to someone who has never activated RelayLink travels as email. Someone who already has an activated account needs an accepted contact pair for a new thread. Either way, they can answer from the mail.
If two people are buying, one briefing still goes to one mailbox. Say that the other person needs to see it. Do not pretend one send reached both.
After they choose
Write back the number and the terms you will put in front of the other side, and ask them to correct anything wrong before you send it. The cheap disagreement is the one that happens before the offer leaves.
The showing was the tour. The briefing is the choice.