For our Lego builds, we are always in a great need of bricks. Lots of bricks. Bricklink is for that our main resource and it is a challenge to find the right bricks for a reasonable price and preferable at one shop to avoid too much shipment costs.
One of the best shops in town (literally, their main office is in Nederweert, quite close to Sioux in Eindhoven) is Toypro. They have a newsletter and we are published in their latest newsletter.