Have you seen these guys? Worth it or not, considering btc difficulty today. They are likely on ebay or something too.
https://bitcoin.co.th/product/bitmain-u1-usb-2-2ghs/
Printed copy · Anthology Volume 6, page 310Printed copy from The Tender For Law Anthology, Volume 6, page 310 (printed 13 June 2014). Added by this site; not part of the Facebook export.