I think you should "rescue" one from the pet store, since you just want a betta as a pet, not for showing or spawning.

That purple guy is GORGEOUS. Don't take this offensively, but I think he should go to a home where he'll be spawned and his lines can be carried on. The main reason he's so much (for a betta, that is) is because of his quality, as I've told you before.

Give one from the Pet Store a second chance - you'd get yourself a wonderful little pet and perhaps save a life.