I'm surprise any of your models are still up for sale TBH, since they appear to be using copyrighted images and trademarked items. Usually that sort of this is stomped on. If ATARI or Marvel etc. decide to do a trawl, and yes, big companies do slap takedowns on 3d sites, expect to wave by to them. Example. I had a model of an Gulfstream aircraft that was taken down for Trademark Infringement because I used the name GulfStream.