We recently met friends in Ghent, Belgium which was very worthwhile. Not only was their a flea market on where i bought some 30 Viewmaster reels but also found "Toys & Things" which was a shop in the Antiek-Depot. Great choice, not only in the shop but through the depot as well which consisted of other antique dealers.
After spending maybe an hour there I promised that I would now be good which meant that I could not properly check out the next shop I found. The Fallen Angels seems to have some great stuff which a look at their website later confirmed. I will have to come back!