They're eBay sellers yet can't pack items properly for shipping...

Back in the early days of this website I traded items with one of the regulars at the time (Jace a.k.a. TudorWhiz if you're curious). I had recently found three vintage exit globes, the ancient type that was screwed onto standard fixtures. Jace wanted one and he also had some stuff I wanted to get.
I shipped a very fragile triangular globe from Quebec, Canada to Maryland (through Canada Post then USPS, I gave myself a fighting chance

) and it got to destination in perfect condition!
That was my very first shipment, no kidding, but I figured out that the globe had to sit TIGHT in the box, so I took a bunch of styrofoam pieces and custom-cut them to a sturdy box just big enough. Then I filled the remaining gaps with an absolute TON of newspaper sheets. Before sending the box I shook the box like mad to be sure the globe didn't move even a little bit!
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NOW , the best for last !! I bought 2 N.O.S , CGE , 120/240v 1000w MV REACTOR ballasts !! The BOX arrived EMPTY with a large hole in the side half-assed covered with clear packing tape !!
As soon as the UPS driver handed me the box I told him "We have a problem !!" The shipping label SAID the box weighed 51 lbs. ! It weighed more like 1 pound !! The delivery was REFUSED and I took photos of the box and damage and sent them to the seller with an "unhappy" message ! Waiting on the seller for a REFUND !!!
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If the ballasts gained enough momentum to PUNCH their way through and out of the box, the box was either massively oversized, largely if not completely empty besides the ballasts, WAY too flimsy for shipping purposes, or all three!
I would've used some light wood to support those 1000W ballasts. First thing that comes to my mind is reuse two empty clementine crates top-to-top to form a box (or just one with the bottom of the second to close it if big enough), with the ballasts inside, then filled with some rather firm filling material like shreds of scrap styrofoam or cardboard, strap the crates shut with steel wire, put the whole thing in another box with styrofoam sheets or multiple layers of cardboard sheets all around, then tape the crap out of it. Yes it's extra bulk, yes it's extra weight, but when I ship something I want that thing to get to its destination and intact at that!