The plastic corrugated boxes (white with black lids) from
Bags Unlimited are the ticket. They’ll hold 50-60 albums each and can be safely
stacked 3-4 boxes high. I used blue painters tape to seal them and it makes for
easy removal. Assuming your mover will be using a 53’ tractor trailer try and
be present for the loading of the truck. Otherwise they will/can potentially
stack the record boxes floor to ceiling to minimize the taking of space.