If you want to travel free bistip is like a boon for frequent flyers . Best way is to built first reputation as a seller or travelers .once you have a good reputation then charge based on per item say 20000 to 30000 idr and try to get the job for multiple item . Always try to communicate during the travel period with buyers . Once you arrive clear all your jobs in next 3 days and get payment.
I got my manila ticket free with these job little hassle to find items for buyers but worth to invest as returns are amazing .