Check out the list of hot deals at Office Depot. There’s a bunch of cheap luggage sets, among other things.
Ordering a bunch? Get your order to $50 and shipping is free (and usually next day). You can use coupon code 57209936 for $10 off of your $50 order (and you’ll still get your free shipping).
The nice thing about Office Depot is that you can always find some pens or paperclips or something to put your order up to $50 if you’re really close.