I wouldn't get too worried. They can go a long time without food, if they are otherwise healthy, though not as long if they are kept too warm (AC was running the last week, right?) and have good body conformation (one reason for pics). It is just good to get on top of things early.
I was hoping the seller might have provided details (tong feeding, food left overnight, whatever), though I suppose that might be a lot to ask from someone who just moves random WC animals. Too bad these guys aren't really available CB -- neat little animals.
