special offers work on everything, from council estates to multi-million pound homes. every company from Rolls Royce to Lada have used special offers.
lots of people will give their opinions on special offers, but that's all they are 'opinions', if you want to know if special offers work ask the people who use them.
if you really want to know if special offers on leaflets work then the person to ask is mark from DP design, ask him which leaflets constantly get ordered ( because they work)
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use the 3 for 2specail offer, because it increases the order value, this will make you the most money