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.)