We recently went on vacation and ended up buying a new bag to use as a carryon for the return trip (because we bought a lot of stuff).  Upon returning home I looked for a value-priced wheeled thing to use in future and this met my criteria.  We can put our outgoing (non-wheeled) carryon inside this, so that we only have one carryon to deal with; and on the return trip, fill this bag with new purchases and carry the non-wheeled item with us.  At this price it's a good deal and it feels pretty sturdy.  It's also floppy enough that the sides can be squished down to make it fit in the security scanners if necessary.