Prices include shipping within the lower 48. 

1. Arcteryx Alpha Comp Pant:  Size M.  Color: Orion.  Like New condition with basically no wear. $ 200 

The Alpha Comp Pant has been evolving and is ready for your next alpine climb. Composite mapping places updated fabrics optimized for performance and zonal weather protection. N150p GORE-TEX INFINIUM in the seat, crotch, thighs and lower leg cuff gives wind proofing and high water resistance. Fortius 1.0 softshell in the waist, back of leg and gusset enables stretch where you need it and gives increased airflow for versatile thermal management. Harness compatible features include a low profile adjustable webbing belt and a WaterTight zippered right thigh pocket to secure items like beacons. The lower leg gusset can be closed snug for crampons or opened for ski boots.

2.  Patagonia Knife Ridge Soft shell:  Size M Color: light blue.  Basically still brand new!  $250

     For detailed info please refer to the link from Patagonia:  https://www.youtube.com/watch?v=M-AGXCixp7U

3. Western Mountaineering Flight Pant:  Size: M Color: Black.  Very light use 

Our Flight pants offer more warmth and added weather protection to keep you in comfort mode when the mercury drops and the weather conditions become more challenging. Winter protection for your lower body doesn’t have to take up more space in your pack than a water bottle. The Flight pants are stuffed plump with 850 fill power goose down and weigh just 12.5oz (360 grams) per pair, yet they can pack down quite small because the insulation is so compressible. For added protection against moisture and abrasion, these pants feature Gore Windstopper laminated outer shell fabric on the seat and knees. Microfiber outer shell fabric is utilized for the rest of the garment for increased breathability and reduced weight. Features include an adjustable waist belt, adjustable ankle closure with draft protection and dual full length, two-way separating YKK coil side zippers with locking sliders.

More info here:  https://www.westernmountaineering.com/down-garments/pants/flight-pants/