To share some of the most common cases reported to mobile88.com

1) Seller from Nigeria / Hong Kong sell at cheap price and ask to pay using Western Union (most of the time ask you to buy bulk)

2) Seller from lots of Classifieds / Forums offer at cheap price ask to transfer or buy prepaid cards for them

So as mentioned by members here ...do COD transaction only with strangers. Some sellers may curse us cause they rely very much on bank transfer for the online businesses. So just be extremely careful when do online transactions.