Removing big engines is not ok and if the bank perfects the liens correct it is fraud. On the other hand, it is hard to enforce. The same situation is happening with people ripping out fixtures from a house that is going in foreclosure. It is illegal, but hard to enforce.
The market is tight but not dead. I would encourage people to try some of their community lending institutions first. If you have a good relationship, it will help. If not, you are just someone that they don't know who walked in to finance an asset that they really don't understand.
Think like a banker, that is a good way to look at it. They want business, but they don't want to lose. Who does?