Found a guy online selling 3 of these backpacks for $60.
They are 100 liter Guide Gear Backtrail backpacks.
Has anyone ever used this brand or have any idea if they are decent? I can't seem to find anything online about them.
Haven't used one. They look like decent entry level backpacks. I really don't recommend a 100 liter pack for anyone unless you already have a ~40 liter pack AND a ~65 liter pack. Make sure you want to go backpacking first, as a 100 liter is for either deep snow camping, or trips lasting more than a week.
That being said, they don't look terribly ergonomic.
Catalog