Here are my masks not released in normal sets, and a glittery Avohkii, 'cause why not.
These all belonged to my friends' brother back in the day. He outgrew BIONICLE and passed them down to my friend, who outgrew BIONICLE and gave them to me, so they've been on quite the journey.
Are any of them especially rare? I don't really collect masks, and I don't know their values.