Keep the first conversation inside the marketplace so you have a record of what was agreed. Avoid sharing private information until it is genuinely needed.
Trust is visible
For higher-value items, meet in a public place during daylight and let somebody know where you are going. Inspect an item before sending payment.
Show the important details
If an offer feels unusually urgent or complicated, slow down. Genuine buyers and sellers will understand reasonable safety checks.
The clearer seller verification would make me much more comfortable contacting advertisers.
I like seeing the view count and safety information without leaving the article.