I generally dont like to return things but for example I bought a Dyson vacuum from Costco online and I love it but ive been resistant to throwing out the box (already threw out all the internal cardboard stuffing tho) for some reason.

I think my logic is that not having the original pzckaging and or/box it came in makes it more difficult or even impossible to return but I have no evidence for thos weird belief. Ive always just kept packing until i was forced by space constraints to drop them but that hasnt overlapped with any actual return experience I've had