Brocante

Considerable experience of brocante visiting has convinced me that few pitch-holders get rid of more than 1 or 2 per cent of the items that they take with them, even with minimal prices.

Look in www.quefaire.be for something local. Most have a number for booking a pitch.

When we've done one, generally about 1/2 the stuff we take goes, and we've made anything from €50 to over €300.

If you have a drive try a garage sale also if you dont sell the petit rien may take what you have left over good luck

There's also a bunch of FB groups you can try
For example
https://www.facebook.com/groups/BrusselsSellSwapBuyWantOrGiveItAway/