You can either buy luggage one piece at a time or find a set that comes with two or three pieces. Price will vary based on the size, material, and brand. You can get a medium-sized suitcase ranging from about $50 to $300. However, there are also plenty of retailers that sell luggage sets for under $300, which is a great deal. Once you decide on the style, material, and size of suitcase(s) you're looking for, you can start comparing the prices among different retailers.