I agree with Jonna. They are very sturdy, and like good drainage. They also have a big, tight root ball like that even when they're not in pots.
As long as the fronds up top look healthy, and from what I can see they do, I think you've got a pretty good bet there for the price. Check the spear (the newest leaf coming out the very center at the top) IF it is green and shiny, that's usually a good sign.
