I do not share your opinion.
The kw have different prices, it depends on the issuing country (more or less inhabitants), it depends if they are checked or not, depends if they are definitive, commemorative or mix, it depends if they are current or of all epochs.
It is necessary to know what wants to be bought and to be important to know the seller, already for previous purchases or for companions' recommendation.
In 1 Kw with fragment of paper they enter(approach) 6.000 stamps.
Lacks and curiosities are obtained and certainly thousands of repeated that they can change, donate to school entities for promotion or to realize handicrafts.
Think that it costs 1 Kw. and that the family is going to the cinema.
In the cinema you amuse yourself the whole evening, with the Kw you amuse yourself a few months and it is cheaper. I recommend to do both things.
CLASSIFIER RESTORED WITH DEFECTIVE STAMPS