Hi, I am selling two PSUs that I have used for my S1s but now they are not needed.
Both units come in the original packing, no signs of wear, so condition is like new.
The price is 0.16BTC+shipping. I can do either direct sale (see my trust) or escrow of your choice.
Also available at Amazon: http://www.amazon.com/gp/offer-listing/B00EB7UIO6/?condition=used