A friend will be at Disney for just one night before her cruise - on 10/31 - and just found out that that the Halloween party is sold out for that night.
If she is military she can still buy a ticket. Disney sells the military tickets only as walkups so they will still sell them the day of after a party is sold out. Otherwise, I think she is out of luck.
Nope, they are non-transferable and non-returnable once purchased. Disney will refund tickets for rare occurrences (they did so for us a few years back), but I wouldn't count on being able to scoop any up. Sorry.