Tricky one...
There are a few Eurobonus promotions you might want to check, some of them have been mentioned here.
If you have an upcoming trip with SAS in Economy Flex you can use 10000 points to upgrade to business class, or if you will do an intercontinental trip with SAS in economy you upgrade with 10000 points to Economy Flex.
An intra-European award flight is 30000 points so that won't work.
However an intra-Scandinavian award trip is only 12000 points and as a basic member, when booking an award trip you can at the same time use points for a hotel stay which costs 10000 points per night Friday-Sunday.
So for 10000 + 12000 = 22000 points you could get a free trip anywhere in Scandinavia with a hotel stay at the destination during a weekend.