All the replies are good suggestions. It just depends whether you want to buy something that will offer good service for years, or for a lifetime.
At least look at your local luggage specialty store for an idea of price and options.
DW and I decided to bite the bullet and buy the best hard sided Delsey luggage and plan on keeping them forever. 30 years later, hundreds of flights and a handful or cruises later, they are going strong and will out last us.
But I realize, some people consider luggage a fashion accessory and are looking less for durability and more for style.
We are more the buy the best and keep forever mindset on everything, which explains why our family car just turned 26 years old.