Luggage should not be considered an "investment".

Regardless of brand, you will never turn a profit off "flipping" luggage (aside from the rare cases, such as the Supreme collaboration).

Luggage should be considered a tangible asset, that has an expected lifecycle, and depreciates over time.

If you are going through luggage at the rate of one per year, I don't see the value in the premium price of a luxury brand.

In that case, I would go with industry leaders, such as Pelican whose market focus is on actually protecting the contents of what is stored inside.