CWH, you mentioned cheap. My son asked if he could wear his old outfit and one of his old masks and go as death. "All I need is a cheap plastic sickle dad." Well heck yeah you can!
Funny. I spent $30 on my daughter's custome this year. We might actually be going to a Halloween party at my Dojo instead of trick or treating this year. That way I might just wear my Gi or just go in shorts and a T; since the party is for the kids.