I just got rid of 50 old pc's for one company I worked for, within seconds of placing an ad on marktplaats we had a taker, a couple of guys from Amsterdam came to pick them up an hour later.

I oversaw the hard drive removal, if you can't be trusted to be sure that you have removed the drives from those pc's before sending them to the recycler how can you be sure that you've done a proper job before sending them in to be scrapped? It's the exact same problem after all.