- Damn, that's a lot of maps.
- Not many maps can be easily rolled into one tube, which could mean lots of tubes for you to roll (and for the recipient to unroll and flatten). Tubes ain't cheap.
- It might be hard to find boxes suited to the size and shape of the maps you're shipping. It might be easier to make your own shipping containers using flat pieces of corrugated cardboard, padding material, and tape*.
- If you want to ship several drawers worth of maps to the same recipient, the "sandwich" solution might get burdensome, too. Custom-made cardboard boxes?
* Cut two pieces of cardboard slightly larger than your maps, then stack the maps between the cardboard, as if you're making a map sandwich. Stuff paper or other padding materials along the edges, and tape the crap out of the it. (If you're ambitious, cut more cardboard to insert as "sides".) This method will keep the maps flat and, if tightly wrapped, unable to shift much. The bigger the maps, the sturdier and thicker your "bread" needs to be.
mf