Hoi - Digitec doesn't always have the "best" price by far - neither here with Nintendo, nor with others - it probably also depends on the conditions under which it was purchased (how it was negotiated), which PM is behind it and how his team is active there and just, as written at the beginning: there are better prices on the market - because those who give you the better price can/want to.
Before I buy, I compare the price on the market - there is often quite a bit in it ;).