Hi
yup maby Digi-key or arrow make lot of money sell us part
or that chiness have some trick that we not knot ,i run myself a assembly house
and even if labor cost noting ,build and run a assembly line still cost money (maintenance ,electricity etc etc )
and it sell board for less that price off the main part alone ,how do it do that ?
ok it sold 16,000 unit but still not a volume that justify that price
only thing i see was
1-) got part from very strange source
2-) that all come from same giant fab that build hundred of different design in million QTH
and it Global buying volume make that possible ,if you order 1 million of LM2596 for customer X you may
add 15,00 extra for that ebay smaller run .... and got it a the million price
but did it wort the money/Trouble to sell something whit less that 1$ profit ?