[jirakob]

First, I've to say I'm from Thailand I don't know where do you buy the betta guys.
I need to sell my betta but I don't know where I should sell and what types of betta you like ? thank you very much

 

[CollegeBettas]

I would try Aquabid there are a lot of higher priced bettas sold there (mostly good breeders), especially from Thailand. You could also try creating a Facebook page, Instagram page, etc. Craigslist is another place as well.
Favorites tend to be elephant ear/dumbo, halfmoon, and koi, but it is always good to have a couple different strains going it you have the time and resources.

 

[MysticSky22301]

You might be able to try eBay there are lots of Thailand breeders with good quality fish

 

[jirakob]

Thank you for all information