I don't own any bettas (yet) and I actually enjoy going to the Petco across the street. The betta cups are always clean, the bettas themselves are always quite active (though few here and there have bitten their fins off).
Last weekend I cam across this beauty!
My Petco gets such beautiful bettas! I remember a month back I saw this interesting boy-
I really like these light colors on a betta! If I ever set up any tanks I would buy them until I was broke O_o