Is this rubber foot really dirty? I just snapped a quick photo of one of the rubber feet on my new in box flex units. Which, in real life, looks quite new...camera don't lie. Or does it...?the last picture you uploaded here clearly shows the Flex rubber feet is full of debris / glue (?) of a device that was sitting outside of packaging for a very long time.
you don't need to return anything, as it is so obvious you received a used / very old product. they need to compensate you with a new one. i hope you're reading this Minidsp people
Point being, you and a number of other folks seem to be making judgements not based on the genuine reliability of the photographs.