I've wondered about this topic. I used to not care about the value, and opened every kit. Recently have been buying what I could not afford, or simply missed out on, some are sealed. I asked about the Aerovette on a new topic a few months ago, it *was* sealed until a minute ago. I see the back window has the freaking tire burn! So that's it, not buying any more sealed Revell and/or Monogram kits anymore, that's BS the windows are not protected from the tires!!!!