You can give the exact location of your office/company or the place you can meet the customers.
You can allow customers to bid for the items and any other things posted to be sold. When someone bid for any post, you will get a notification with the buyers’ number and the bid. Then you can decide to accept or not.
You tube video
You can link a featured YouTube video of the items / anything you wish to sell on gamuko.lk or your own YouTube video.