It depends how 'special' you're after. UK breeders such as Joby have nice fish for very reasonable prices, but if you're after, say, an imported Thai betta then KGBettas or similar is the way to go. Of course, if you're more interested in getting something that isn't a VT than something fabulous, most LFS's can get you in different tail types of various qualities, but of course, you don't see the fish until after it's been imported.