Opinions on these bikes?

I am mostly concerned about durability, shifting being smooth, not being creeky, and shock quality for the ones that have shocks. Light riding. I listed them pretty much in order of what im interested in.

Please compare these 2:
Wahoo trek 26 used $80
Gt switchback pro 26 used $100

Then compare these:
Shwinn axum compx new $275
Ozark trail ridge m.2 used $150
Cannondale Treadwell used with rack used $300
Cannondale treadwell 2 used with rack 400 obo, another no rack used 300 but replaced front wheel
Cannondale adventure 2 used $500
Del sol 3 used $175
Trek fx1 used $140
Trek fx2 used $200
Marin mtb (bobcat trail. I think) used $400
Damaged santa cruz used $800