So the day comes and I am happily awaiting my new rare keyboard, then I get this at my door:

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Re-Packaging request blatantly ignored again. Anyway, there is hope!
What you need:
* Lighter
* Hair-dryer / low temperature heat gun
The first step is to take your lighter and "rub" the flame a bit around on the edges on the shipping label. Don't do this for too long, and always keep the flame in motion. You don't want burn marks on your box. After a few seconds, grab an edge of the label with your finger nail. Once you got a good start, its time to get the hair dryer out. While gently pulling the label, apply more hot air with the hair dryer under the shipping label. This is hard to explain, but obviously easier than it sounds in written form. Be careful, the air is actually hot. Don't be a wussy and man up!

Be sure to do this very slowly. Even with a lot of hot air, some labels still tend to rip off parts of the box cardboard. So take your time.

There you go! As good as new. Note that the keyboard used in this tutorial is a pretty shitty keyboard and I only used it to demonstrate this ancient technique. Enjoy!