Used Nordic Track Pro in good condition, but missing one of two "slider spacers", which are just small rubber clips that keep the exerciser arm from rocking. You can buy a set of these clips online for about $10 from this website:
https://www.nordicfitnessskimachines.com/collections/original-nordictrack-ski-machine-replacement-parts-upgrades/products/2-black-plastic-clip-7-8-long-5-height
On the plus side, I'm including the blue 'workout computer' that came with this unit. Here's a link to a similar item on eBay. https://www.ebay.com/itm/156857095007
The unit is disassembled and ready for pickup from 2nd floor apartment off W6th Ave/Union.