Selling hacked consoles is difficult to pin down the offence, but selling pirated games is a quantifiable offence and very easy to stack up the charges. Say he put 100 games on each flashcart, and each game averages RRP at €40, that's a €4000 offence straight away. Add to that a fine for each individual offence (read, each infringing game on that flashcart) and the amount can scale into five or six figures depending on the ruling. Multiply that for the number of flashcarts......
Yeah, selling piracy is a bad idea. And they come down especially hard on the providers (like this guy) to make an example of them and scare ordinary users away, even though European law technically enables police to charge anybody who happens to have a hacked console or flashcart when caught (the law is there, but is never really enforced).