If you had one for sale, where would you advertise a Hepa/filter/fume extractor for a laser machine? Its not the sort of thing i've had much of a need to sell before. I dont think it would be the sort of thing to chuck on ebay. I'd hate to see it sit around for years doing nothing. Maybe admin on here should consider a 'resources for sale' section, so schools could sell/swap or even freecycle such things.