I've rehomed one of my fish. His name was Sherbert. A friend got bit bad by the betta bug-- and she bought 2 10 gallon tanks and stocked them with 1 male betta each and other tropical fish. After a big die-off that left only Sherbert in the one tank, she decided she only wanted the one. She gave me the 10 gallon with the condition that I would take Sherbet with me.
Now, it's not that he wasn't a sweet fish. He was just.... pink, and purple. And a vtxct mix with raggity looking fins. Healthy little bugger, but not my idea of pretty. My little cousin though, and my aunt, thought he was the prettiest fish that they'd seen. He now lives in a heated, filtered tank that's just shy of two gallons. He gets %100 water changes every week, with a rinse of his gravel, and he gets fed twice daily. I've been to visit him a few times and he's doing great-- honestly I didn't pay much attention to him while I had him, and he seems even perkier, I assume since people are cooing over him all the time.