Wow. I didn't know it cost so much. The link I found said you have to take a course, I guess the course is the big money? This is copied from the link.
Class 2 mopeds don’t require a license – just a special permit, which you’ll get after you’ve taken a special written exam at the Swedish Transport Agency. Of course, if you have an AM license, you can ride both Class 1 and Class 2 mopeds and scooters. Since Class 1 and Class 2 have their own unique advantages, getting an AM license is therefore worth the extra “trouble.”