Buy Used Trek 7200 Multitrack or Buy New Giant Escape 3. Need New Bike to Commute

Hello. I am looking to get a bike so I can commute to work.

I saw this Trek 7200 Multitrack bike for sale: Check Attachment Is it a good deal? Anything I should be aware of when buying a used bike? Is the bike in good shape? Anything I should ask the owner?

My other option would be to buy a...