Hi,
I am selling my snow chain SECURITY CHAIN COMPANY SUPER Z6 (original price, $80 + tax) for $40.
The size is P225/50R17. I have only used it once for a road trip last month.
I bought is after reading the reviews here:

http://bestreviews.com/best-snow-chains

It has received good reviews on Amazon.
http://www.amazon.com/gp/product/B000HZA2LK?psc=1&redirect=true&ref_=oh_aui_detailpage_o04_s00