I'm selling one Necksgen REV head and neck support (hans) unit in excellent condition.  Medium size with 3 inch belt space.  Comes complete with quick release helmet anchors, tool kit and bag. 

manufacturer's info:
http://www.necksgen.com/product/rev-medium-3/

The REV is a low profile design that offers very good helmet and seat clearance.  Accommodates up to 3" belts.  Weighs only 1.3 lbs.  Certified SFI Spec 38.1

Asking Can$500.00
Contact Ron via email at rvanderhelm at telus dot net

Still available and open to offers.

Here's why this is a good deal.  You use the item until the end of the 2018 season.  Then you send it to Necksgen for re-certification, which will cost Can$130.  They will install a new tether and certify it for another five years.  It will be effectively brand new at that point.  You will have paid C$360 plus C$130, total C$490 for a value of greater than C$640 (price of a new one plus one additional season).   However, you only need to put out $360 right now, and the rest later, which will conserve some of your cash for the time being.  I'm open to offers too.