I have had my work recasted several times and it stinks especially when you see recasts being sold for 80% less than the original price.
Unfortunately get used to being recast. It happens when you don't own something. There are too many people out there who have no skills or if they have the skills they don't take the trouble to use them for some reason. At times there are going to be people who turn up who are going to try and exploit those of us who can make a master pattern.
What can you do? Here are some ideas.
1. Unfortunately, get used to being recast. It happens when you don't own something. ...so you can make props, costumes, etc for things you do own.
2. Make parts with hidden undercuts or parts that are partially assembled so they can't be recast(I think I mentioned that here before).
3. Get the word out if you can about the recaster(as some are doing on this thread already). Many people don't want to buy a copy of a copy but there are going to be some who will still buy if the price is right or if they don't know it's a recast. Moderators at the various boards are not really police so they may do nothing and I suppose you can't expect them to. Fortunately the RPF doesn't approve of recasting and with proof they will act - I know that for a fact and appreciate it. There is one board that will do little and I even had one moderator actually tell me I was
"bothering recasters" (via PM as I'm sure he didn't want the public to know he was making a statement that is supportive to recasting)by keeping up to date on their user name changes and emailing to ask them(sometimes more than once) to stop selling copies of my work.
"Bothering recasters" is a very odd comment since most customers really don't mind getting a heads up so they don't get screwed on a bad(and trust me,
they are bad. I have pics) recast and most fabricators don't mind knowing new user names for talentless people who recast so they can know who not to sell to.
4. Report your recaster findings on PropSafe.
http://s1.zetaboards.com/propsafe/index/
5. Try and get a license for items. It's not always pricey but it depends are what the item is. Offhand I know 4 guys here who make officially licensed stuff.
6. If you have the skill work for people who make what you are interested in. I have worked at a makeup effects shop, several prop shops, a company that makes models for model home communities/resorts, and McFarlane Toys just to name some. Working on a fan production level you tend to run into certain problems. Working on a corporate level there are other departments to deal with those things so you don't have to.
7. And document the heck out of any arrangement you make. I have had people say thats silly but when a business deal goes bad nothing does better than to have pictures, written agreements, emails etc to back you up if something needs to go to court. This paragraph may not sound like it pertains to recasting but if you outsource your work another person and over time they want to do their own thing with your castings you will find this advice to be golden.
My 2 cents from my experience.