used lawn mowers

There one in Waterloo at the main traffic light where you find the big food GB, Autoto5 and Pizza hut. It sells both new and used.
I have a small electric one I no longer use because someone comes to mow the lawn. It works OK and is adequate for 100 square meters or so. If you're interested leave your email and you can have it for 35 euros.

In French or Dutch: http://www.2ememain.be/jardin/outils-et-machines/tondeuse/