Increases in value are realistic above all with limited editions and with vintage writing instruments up to the 1960s, especially in rarer colours like Bordeaux Meisterstücks; with standard writing instruments, a substantial value development is hardly to be expected. The market development remains uncertain, but a Bordeaux 146/167 set rather speaks for "holding" over 10 to 20 years. Collectors largely see writing instruments not as an investment but as objects of love for use; as an investment there are better alternatives. Hold back near-mint pieces before sale; sell used ones promptly when they are no longer used.