Buy something else
So you run out of ideas ?
We open every box to add a company sticker in an unobtrusive location, check and compensate probes, check FW and install options if/when required. Reset menus to factory settings and the observant might notice just one previous start when they power it up for the first time.
Lastly add a full product brochure and button it all up ready for dispatch.
Most don't bother with all that but still might open the box to include the likes of a MSO probe or external USB AWG options and then forward the SW options by email at a later date, hopefully before the new owners option trial times expire.