That's a different case, but if someone is spending a lot of time and money to do what you're doing legitimately then your sales would be affecting his potential sales and possibly enough that it would make any legitimate production uneconomic. If I collected rare paintings and found some nobody else had through my own hard work and skills, I wouldn't reproduce it for sale, I'd just be happy I'd got it and make it available to whoever had any rights. Surely collecting should be about just that and if you want to take it to a business level then that's another matter and you should play by the rules of the business.