Check if a website or seller is legit before you pay

Help me check if a website or seller looks legit before I pay.

URL or seller: [paste]
What they're selling: [details]
How I found them: [ad, search, WhatsApp]
Pressure tactics: [countdown, only today — describe]

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

Then:
1. A pre-pay checklist (URL, contact, reviews patterns, payment method).
2. Red flags in what I've described.
3. Safer ways to pay in general terms.
4. For scams and account takeovers, point me to official help (the service's own pages, NCSC, Report Fraud at reportfraud.police.uk / 0300 123 2040 or Scotland 101, 7726 for scam texts, report@phishing.gov.uk for scam emails, and 159 or the number on my card if money is at risk); never ask me to share passwords or codes with you.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts, steps or official URLs you're not sure of. UK English.

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