Hey Indonesian people, I think you know this site http://www.tokobagus.com a marketplace for you to sell everything you have online.
No matter new or second hand items is listed here from fashion to automotive stuff you can get in easy.
A new method to gain maximum profit is get the list of seller there. As an example you have a neighbor who produce great backpack you can go there and make your list of backpack seller.
Then contact them all. Offer them opportunity to sell your product as reseller or wholesaler. That was easy.