How does everyone mail Rack Packs?

For single racks and say up to 4? Do you lay them in a 800 count box? Do you mail singles in a 200 count? should they always stay flat or do you stack them in thirds ? Any suggestions would be great. Thanks.
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Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.