Travel costs rip-off (often in taxis) repeatedly leads, at newcomers to success.
The strong demand Faher usually inflated prices, what works often.
Insist on your meter. The liter of petrol here costs about 35Bath. If the driver does not take you with, take the next. At best it breaks with buses. If you ask locals just nice, it is sometimes down for nothing. For longer distances, renounce completely on taxis.
An overview of Transportation in Thailand with prices can be found here.