Looking for philatelist to evaluate/buy stamps

If you start at the rear of the Bourse building in the centre and head south towards Gare du Midi, you will be on Rue du Midi. At some point on the left hand side the is a philatelist/postcard collecting shop. The guy there bought a stamp collection off me once.

There are quite a few on rue du Midi: None seem to be on the internet, but old listings show these. There absolutely are more than just three.

Williame Maison, Rue du Midi 7, 1000 Bruxelles
Olivier De Jonghe, Rue du Midi 63, 1000 Bruxelles
Philac, Rue du Midi 48, 1000 Bruxelles

Also look in the Gallerie du Centre, I think there are a couple there as well.