Consignment stores in Brussels?

My wife and I are leaving Brussels after a year, and we have a lot of extra clothing that we don't want to take. We don't have time to wait to sell it all online.

Does anyone know of a place that will immediately buy the clothing directly from us?

We tried Troc.com, as they do buy things for cash, but they did not want any clothing. There is of course the Salvation Army as a last resort, but we need cash.