When using a previously-used espresso machine, make sure to drain as much water as you can from the boiler. Also remove loose and protruding parts like feet and knobs, wrap these items individually in bubble wrap and pack in a separate box. This package can either be packed with the machine or shipped separately.
Pack the machine in its original box making sure that all sides and corners are protected and there are no void spaces that will allow the item to move around. Double box the package, filling the outer box with packing materials on all six sides.
If the original packaging is unavailable, use a sturdy cardboard shipping box that is not too big nor too small for the machine. The item should fit snugly inside the box with only an inch or two of extra spaces on all sides. Wrap the espresso machine generously with bubble wrap and place inside the box with a layer of packing peanuts or foam pad in the bottom. Fill the sides and top with more packing materials so that the item cannot move around. Use a slightly larger box to double box the package and use ample packing materials to fill void spaces between the two boxes.
Close the box and seal securely with packaging tape. All seams and flaps of the box, including the ones in the bottom, should be reinforced with packaging tape.
Address and label the package and take to your local post office or reputable carrier.