Why Inventions Fail to Sell: And How to Go from Ideas to Profits Inside 30 Days
14,69 €
It is the transcript of an interview with one of the world's top experts on why people buy what they buy. Also known as market research. This is NOT common. Most inventors do NOT see a profit until months or years after having that idea (if they don't go broke first).
Jetzt bei Ebay:
