[ghaff]

>a market for someone arranging picking up, storing and delivering luggage on demand.

There are although there might need to be someone on the other end to accept the delivery.

These are mostly for business purposes though. I looked into it once for a complicated mixed personal/business trip and, while I don't remember the numbers, it was fairly pricey for an individual especially if you get free luggage on your carrier.

[vidarh]

See my other comment expanding on what I meant. I explicitly don't want to ship it from home, but have it stored in a city I want to come back to regularly so I don't have to ever pack when going there.