The mermaid tin was my first altered tin, and also my favorite, so far. I used a vintage reproduction photo and real seashells to create it.
Moulin Rouge, pictured, sold on eBay and I had a few requests for more with the same theme. I had consider making another Moulin Rouge themed tin but it takes forever to seal the tin and prepare it for paint. It has to cure for at least two weeks before I can begin to work on it, and I don't really have that kind of patience.
The profit margin for these tins is relatively low since they are so time consuming to create. I did see half of a tin decorated with a vintage reproduction image of a child sell for $75 on eBay, but I think this is the exception, not the rule.
I'm currently working on an Asian/Oriental and Travel/Journey themed tins, and may create a few with a Valentine's Day theme.