My buy price for tin was $18 a kilo, and copper was $4 a kilo, but
this price has risen to $8 or $9 for copper, and I don’t currently
have a source for tin (I still have a chunk left though).
I really like 90/10 (if you haven’t gathered by now), so my raw
element purchases will reflect this mixture.
I bought 9 kilos of copper, and 1 kilo of tin which worked out to be
$5.40 a kilo, which worked out to be $2.45 per pound. Currently the
exchange rate between our countries is even par, so we don’t have to
worry too much about currency conversions to muddy the conversation.
Looking at http://www.ganoksin.com/gnkurl/3b The site gives a metric
tonne price for the metals, so you can easily divide by 1000 to get a
The price for Tin is about $29.98 a kilo
The price for copper is about $9.84 a kilo
Let’s say you use tin as the base that costs you $29.98, then you
buy 9 kilos of copper, that’s $88.56, to give you a nice 90/10 at
$118.54. Divide by 10 gives you roughly $11.86 a kilo, divide by 2.2
to give pounds to give $5.39 per pound.
So it’s do-able, although it’s 39 cents per pound over your ideal
When I find a local tin supplier, I’ll be buying more tin. Currently
I have to recommend sterling silver for some of my customers, as tin
is difficult for me to get at the moment. Substitute stair boxes
hasn’t panned out yet.
Regards Charles A.