WOW! You have some pretty nice machines. Most all are fixable. Here is a connect to a website that fixes and sends sewing machines to missions.
http://www.tfsr.org/publications/tec...achine_manual/ My suggestion would be so sell some of them to pay for shipping for the ones that can be sent to missions. The info is how to donate and everything you need to know to make the repairs. There are plenty of on line sources for parts for those machines. The 3rd and 4th ones aren't as nice as all of the rest. Quite a few of them could be treadled.