The way to buy stuff on OLX has changed quite a bit. Firstly, you will not be able to reach a seller unless you're logged into OLX. Everyone must have a profile for security.
Once logged in, you can scroll through ads to your heart's content. If there's anything that tickles your fancy, you can start a Chat right on the ad
Why send a message through OLX.com.pk?
Because it is the surest, recommended source of contact.
Remember! The Seller can always block your messages, so the lack of response to your request is the result of a decision of the Seller, not a system error.