I already have 3 real ripper helmets (and now 2 replicas) so I didn't want to go too high. I only placed that first bid to make it harder for the seller to end the listing early, but I did plan on going back in to increase it later.
That helmet is really interesting to me because it's clearly shown in the trailer. Also, the ears on mine are not split open like that. On my two hero helmets, the neck clips are functional but the ear hinges and ear clips are only there for appearances. I assume it's because the one you just bought was worn over a full make-up with ears and mine were not.