Oppopinions - Fixing my bike edition

As some of you may remember. My mountain bike has popped a spoke and the bike shop could not get the freewheel off. I looked at replacing the wheel with a like for like but since I’ll also need a new gear set I figured I could buy a used bike and get an better wheelset. My budget is $150 but less is more better.

Currently I have a shimano 21 speed setup so bonus points for being able to slap the wheels on and go.

I like this schwin as it’s close to me:

other options I found

This LL Bean bike seems like a good donor.

This one has yellow pedals

Maybe the Trek? It looks pretty rough though.

Another Trek. I found a lot of Treks

Here is one last Trek