well i totally missed the bit about dwarf puffers! haha!You didn't mention dwarf puffers, another member did. I was correcting false information, whether it came from you or someone else. The last thing you want is to start back out in the hobby with misinformation.
Although much of what I've learned about this hobby has come from books and magazine articles, a great portion of my knowledge has come from experienced forum members on here. You will learn in time which individuals are trusted and knowledgeable after following advanced, inventive projects they document on this site, noting consistencies when comparing their advice to well reputed publications, and by simply implementing their suggestions and seeing that they work.
As for selling fish to a pet store, you may be able to find a place that is willing, but I wouldn't hold my breath if I were you, and that's all I meant before.
and thank you for your information, i greatly appreciate it!