New Backpack Dilemma

So I've been wanting a backpack for a while now... and stores these days are so unreliable. So I finally remembered! EBAY EXISTS! And it would be cheaper! Or so I thought. I realised for many bags, that are very very very very nice, they're quite expensive ;A;

I have found a few that are keen to my liking, but have difficulty choosing which one I should decide to get >.< SO MY DEAR READERS! LET'S HELP ME PICK A BACKPACK!