Let's take a vote on which badges (abzeichen) represent the best investment. By best investment I mean their potential to either hold their value or increase in value.
Let's assume we're considering "high-end" pieces. For example, a 1939 EK 1 in its original case plus its original outter cardboard box. Absolutely mint.
It's very difficult to make a comprehensive poll so I've included those which seem to be the most popular.
PICK YOUR TOP (3) CHOICES!