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Decide whether to buy that advert, directory listing or deal-site offer

A friendly salesperson has rung about a magazine ad, directory listing or voucher-site deal and wants an answer today. Work out whether it's worth it before you say yes.

Updated 17 Oct 2026

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The prompt · ChatGPT

Help me decide whether a paid advert or deal is worth it.

What's offered: [e.g. quarter-page in a local magazine, directory listing, voucher-site deal]
Cost and terms: [what they've told you, including length of contract]
My average sale and rough margin: [numbers]
Who reads or uses it: [what they claim]
How I'd track results: [e.g. a code or a special phone number]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. Break-even: how many new customers it needs to bring to pay for itself.
2. For deal sites: what happens to my margin, and whether these customers come back.
3. Ten questions to ask the salesperson (reach, proof, cancellation, renewals).
4. A polite "not today" reply and a "yes, on these terms" reply.
5. How to test it small first.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts or results. UK English. Don't give financial advice; just show the sums with my numbers.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.

A short example

Fill the blanks, then paste. e.g. quarter-page in a local magazine, directory listing, voucher-site deal: a short note you already have. what they've told you, including length of contract: a short note you already have. Leave the rest of the prompt as written.

The prompt · Gemini

Help me decide whether a paid advert or deal is worth it.

What's offered: [e.g. quarter-page in a local magazine, directory listing, voucher-site deal]
Cost and terms: [what they've told you, including length of contract]
My average sale and rough margin: [numbers]
Who reads or uses it: [what they claim]
How I'd track results: [e.g. a code or a special phone number]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. Break-even: how many new customers it needs to bring to pay for itself.
2. For deal sites: what happens to my margin, and whether these customers come back.
3. Ten questions to ask the salesperson (reach, proof, cancellation, renewals).
4. A polite "not today" reply and a "yes, on these terms" reply.
5. How to test it small first.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts or results. UK English. Don't give financial advice; just show the sums with my numbers.

Stay in this Gemini chat. Leave extensions off, including Gmail and Drive.

A short example

Fill the blanks, then paste. e.g. quarter-page in a local magazine, directory listing, voucher-site deal: a short note you already have. what they've told you, including length of contract: a short note you already have. Leave the rest of the prompt as written.

1

You describe the offer, its cost and the terms.

2

The assistant asks your average sale, your margin and how you'd track results.

3

You get a break-even check, questions to ask, and a polite reply whether you say yes or no.

What happens

Use Gemini to decide whether to buy that advert, directory listing or deal-site offer

A friendly salesperson has rung about a magazine ad, directory listing or voucher-site deal and wants an answer today. Work out whether it's worth it before you say yes.

Tools

Paste the prompt, fill the blanks, copy the draft.

  • Gemini — required. Drafts from the text you paste. Nothing is sent.

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