Who, in their time in the CFS, hasn't had a second hand helmet?
All those years ago I think I started out with a TopGuard helmet, worn by a 10 year veteran prior..
Things are probably slightly better now, but I know plenty of firefighters who have worn something for one job, or one training (being brand new), decided to quit, and had that gear then sitting around.. No use binning it, its still perfectly fine.