So as I'm repackaging what I thought were NXT-FRX bindings I've discovered that the high backs are actually from the NXT-ATSE while the base plate/footbed and power strap are from the NXT-FRX. I don't believe that the ATSE high back has much effect on the overall feel of the binding (I have a pair of 2010/2011 NXT-FRX and I didn't notice any difference between the two) so I would still consider them a stiff freeride binding.
These were on my 2013 LibTech TRice that I bought at the end of last season and I rode the setup a few times before the season ended. I rode them a few times this season before I had knee surgery in mid January so they're practically brand new. These are great bindings - they're very responsive. There is slight wear on the high back and footbed foam but it's almost unnoticeable. The bindings will come in their original box with all of the original parts and packaging. The reason I'm selling them is because I bought some new Flow's with the canted foot beds to help take the strain off of my knees.
The bindings had an MSRP of $309 (the tag is on the box) but I think I paid $200 for them. I'm asking $100 for them shipped or if you're in the Milwaukee WI area you can pick them up for $85. I would prefer to get payment via PayPal so that both parties are protected but alternate forms of payment will be considered.