www.meeraanbiedingen.nl provide you a list of promotion items and products that are on sale in the dutch shops.
E.g. you can find all products that are on sale in the supermarket. It is also possible to look for a specific product in a range of shops. This way you can always get the best buy for your money.
Handy search keywords:
kip = chicken
vlees = meat
bier = beer
vis = fish
brood = bread
varken = pork
rund = beef
If you need more keywords or other questions, just post here.
