Complex sentence: The ONCB began using the devices in 2007 to combat drug smuggling in northern Thailand and bought its units at a price of 400,000 baht ($12,000) apiece.
Split into simpler sentences: The ONCB began using the devices in 2007 to combat drug smuggling in northern Thailand. It bought its units at a price of 400,000 baht (US $12,000) apiece.