In NYC there are people who buy them in bulk from the police/government and ship them back 'home'. Evidently there is enough profit to run as a business.
As far as a donation goes, the charity might be able to give you some sort of tax write off assuming you want to go through the trouble to claim it. If you want to donate you bike, leave it outside a few days before recycling pickup with a note "Free bike, working condition, please take it".
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.