Back when I started making props at 16, I put price tags on items in my mind of what I thought things would be worth. My Dad gave me some great words of wisdom: "It's only worth what someone is willing to pay." Could you sell those masks? Sure, they're solid paint jobs, but just don't expect to get $150 per mask like Auz & Brasier76. You could probably get around $50 a mask on EvilBay or Etsy easily.