Transaction value scrutiny for imported second hand machinery can be rejected, prompting depreciation based replacement cost valuation. When an assessing officer has reason to doubt the truth or accuracy of the declared value of imported second hand machinery, the officer should invoke the procedural deeming provision in Rule 12 to seek further information; if reasonable doubt remains, the declared value may be rejected and value re determined under Rule 9 by reference to the certified price of a new machine scaled down by depreciation, supported by an independent Chartered Engineer's certificate detailing manufacture year, condition, reconditioning and expected life.