Olx is develop for resell products to buy and sell.
Means if you have any old mobile and its have none of use and you want to sell and make some handsome money come and join Olx.in its been fantastic.
I have first selected the site for selling my mobile iphone 4 16 GB black and within 2 days I have sold it by the way of olx its amazing and the price that I earn is the best upto market at that time.
You may find the many buyers at a time its the beneficial for the site.
But one thing is that you may have to check whether the product you are going to buy is ok or not. But then also as my experience it was great and request to all come and try once.