The problem is there is no value given to the amount of precious metals that are in a motherboard... The assumptions made have no basis in science and have since that period of time become a tiny fraction of what they were. There's no point to start a calculation from aside from wild guess and random assumptions.
TCM's link to scrap prices of various E-waste items is about the best you could get and a solid chunk of that is from re-use of components not the raw metals price.
i just thought i would also point that while it may indeed be true that gold content has decreased, there seems to be two faators you are neglected to take into account
1) we are talking scrap so that is likely to mean "older" E scrap past being useful and therefore possiably more precious metal content
2) the price quoted was $300 per ounce (troy) current value per ounce(troy) $1,787, i would have thought that this rise in price alone more than covers the decrease in content for newer scrap.
thank you for the link brown out
i also found the following that may be of interest and at least has some figures, although i exspect theese to be fully discounted
http://www.electronicstakeback.com/wp-content/uploads/Facts_and_Figures
interesting figure for cell phones
1 ton cell phones (approx 6000 phones) contains $15,000 in precious metals and thats at a very low metal price (1998).
to quote "“A ton of used mobile phones, for example – or approximately 6,000 handsets (a tiny fraction of today's 1 billion annual production) ‐‐ contains about 3.5 kilograms of silver, 340 grams of gold, 140 grams of palladium, and 130 kg of copper, according to StEP. The average mobile phone battery contains another 3.5 grams of copper. Combined value: over US $15,000 at today's prices.”32"
and just to dot the i's and cross the T's for those that need it, the source they are quoting is
32 United Nations University (2009, September 17). Set World Standards For Electronics Recycling, Reuse To Curb E‐waste Exports To Developing Countries, Experts Urge. ScienceDaily. Retrieved September 21, 2009, from
http://www.sciencedaily.com /releases/2009/09/090915140919.htm
i would have thought they could be considered a reliable source.
so yeah i guess brownout hit the nail on the head... the info is actualy out there if you look! although i still havnt seen anything that would make me think small scale reclaiming wasnt viable