Although it comes in different forms, vote-buying in the Philippines has been rather consistent in terms of methods. Here are some observable patterns:

It is systematic. The candidates themselves do not do the actual vote buying. Instead they have coordinators working in the barangay and purok levels who do the dirty work for them.
No amount is ever too small or too big. In a documented case in Cagayan de Oro, vote-buying goes for as low as P1,000 per head. Meanwhile, in Samar, one of the country’s poorest provinces, rates could go as high as P5,000 to P7,000.
It happened even after poll automation. One might think that the country's transition to an automated election would eliminate vote-buying. The truth, however, is far from that. Since the 2010 poll automation, incidences of vote buying have actually increased, the Comelec observed.