http://www.gensci.com.cn/green/english/products.htm
you have to email them.
Here was the response I got:
Thanks for your interest in Jintropin.
Price is $21/10IU, shipping is additional(by UPS), Our normal minimum
order is 500-1000IU, for 500IU shipping is around $90.
If you are frequent buyers of our Jintropin. We highly recommend you to
join in our 100% guarantee delivery insurance program. You might have
purchased our product without running into custom problems, but sooner
or later it will have the chance of being checked and stopped by
customs, just a matter of time. And from our experience the chance being
15-30%. And we think our insurance program is the only way to solve it.
In this program you add $3/vial for each shipping, In case of
confiscating by custom, we will reship it for free.
Through our experience, none of our customers have ever lost their
product! We can guarantee 100% delivery. That's why our brand has got so
popular in the US.
If you like to join the program, total payment for 500IU is $1300.
when you decide to buy, please wire your payment to our account or pay
by western union and after we receive the payment, we will ship it
immediately. UPS typically takes about 5 days to get to you.