Prices don't include shipping. See below for more pics and descriptions!

Black Diamond Creek Transit 32 - 60$
Gregory Alpinisto 50 (size L) - 75$ OR willing to trade for a comparable alpine pack in size medium
Black Diamond Demon Duffel - 40$
Mountain Warehouse High 20L backpack - 20$

Black Diamond Creek Transit 32 - 60$ + shipping
Super versatile backpack. Utterly bomber construction, so it is suitable for climbing or outdoor use. But it also has a convenient laptop sleeve and bright reflective panels, so it would make a great student or commuter pack as well. The separate zipped compartment at the bottom is especially nice for shoes. I took it on a trip to Costa Rica, where its essentially waterproof coating was invaluable.
Great condition, light cosmetic wear only, indestructable.
https://www.blackdiamondequipment.com/en/climbing-packs/creek-transit-32-BD681197_cfg.html

Gregory Alpinisto 50 (Size L) - 75$ + shipping or trade
Fantastic backpack in like new condition. I used it for one overnight trip, before realizing I had a size L instead of medium. Willing to trade for a similar alpine pack. Fully strippable, renowned alpine mountaineering pack. It looks yellow in the pics, but is more of a marigold color in real life. One small scuff, pictured.
It's this one: https://www.youtube.com/watch?v=w8sr0g0wdbY

Black Diamond Demon Duffel - 35$ + shipping
This model has been replaced by the Stone Duffel, but they are basically the same, except no rope tarp in this one. Great condition, but has some wear. Classic crag pack, perfect for sport, trad, or TR climbs. ~42 liters.
https://www.blackdiamondequipment.com/en_US/climbing-packs/stone-duffel-42-pack-BD681158_cfg.html

Mountain Warehouse High 20L - 20$ + shipping
Like new. Surprisingly rugged materials and zippers, and pretty stylish too. Has large side, front and top pockets. Only bought it because I needed an extra bag on a flight, so it's basically brand new
https://www.mountainwarehouse.com/us/high-20l-backpack-p17731.aspx/navy/