Storage boxes. Can I discard high end shipping boxes, and still sell in the future?

Original boxes are all about getting maximum protection for shipping. Nothing hand made can mold to the specific equipment quite as well. Hence the value of it if you plan on selling it down the road.

Having the original box and packing materials from my vantage point are important from selling or buying standpoints. I keep all of mine, but I have room to do so. I don’t generally buy used gear but if I do  and the seller doesn’t have the originals I pass. What someone thinks suffices for internal packaging vs what the manufacturer does to limit possible damage can be 2 very different things

I tend keep the boxes for gear that would require freight/pallet shipping.

Resist doing it. Major pain in the neck to figure out- and to purchase enormous amounts of packing material- and not having the factory boxes makes shipping them virtually impossible. So, you're then left with only being able to sell them very locally. It's practically worth keeping them in storage somewhere.

In my experience and I’m paying storage fees ($190AUD/month) to save my boxes… because the foam inserts and boxes cannot be easily replaced esp for gear that is over five years old. Manufacturers are not always a reliable source. Values can drop 20% because of this at resale.

And if you are shipping, then nothing replaces original packaging. FedEx total destroyed my ARC D240 amp when asked to pack and ship. They didn’t pack it, they sent it as is then denied the insurance claim on it too.

You can use room space or attic space to store provided you control pests…

But keep your boxes and inserts. If you want to sell and ship safely. I’ve shipped so much gear all over the world UK EU USA AUS Middle East Singapore and original packaging is the only choice that’s secure for components.