How can I effectively market and sell land in Sri Lanka, especially to serious buyers or investors?

Hi everyone, I’m trying to sell a piece of land (large plot, residential area) and I’m new to the process. I’d love advice from anyone who’s sold land or knows the best methods, particularly for attracting serious buyers or investors/developers.

Specifically, I’d like to know:

Which platforms have worked best (Ikman, LankaProperty, Facebook groups, agents, etc.)

Whether it’s worth using an agent or handling the sale independently

How to attract serious buyers instead of time-wasters

Tips for taking photos, writing the ad, and pricing the property effectively

How to market the land to investors/developers, including the info they care about (ROI, zoning, access roads, nearby developments, etc.)

Strategies for contacting investors or developers directly versus waiting for them to approach

Common mistakes to avoid

Any personal experiences, practical strategies, or insights would be super helpful. Thanks in advance!