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

you must have a lot of equipment if you need to have a storage unit for just the boxes. Don't the boxes have a lot of air in them, can't you collapse them?

Possibly cut them at the seams and flatten them for storage. Repurchase packing material when you sell.

If I flatten the boxes and discard the original foam, will the resailability be as adversely affected? In thebfuture I can ship the equipment in the original boxes, but with new bubble wrap or other internal material.

Been buying and selling equipment for years. Absolutely keep the original boxes and any associated packing and paperwork. When I buy I'm looking for this as part of any equipment purchase and would expect a significant discount if the original packing is not available.

keep the foam. With the flattened boxes, you’d still save half the space. The biggest reason to keep the boxes is to be able to safely ship them then or take the pieces with you when you move. But of course, I would not keep the boxes for cheaper items under $500

Any time I ship something and I don't have the box, I double-box it and spend 30 min on making it sure it's safe and I wish I had the original box