If you're looking for a good ROI (Return On Investment), here's a way of making 30% in just 5 days.
(No, this isn't a con, this is genuine. Send me all your money (joke). No - go to a UK post office and buy some first and second class stamps. By Monday they will be worth around 30% more.
On 30th April a first-class stamp in the UK will rise in price from 46p to 60p and a second-class stamp will go up from 36p to 50p. As the stamps don't show their monetary value, just their status (First / Second Class), you will be making an excellent investment.)
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