All of them are special. If you get a rescue, you're just encouraging the company to get more. :( But you're saving them from dying. :/
A Thailand Import, I've heard those don't last that long. Probably because of the huge difference of the water even if you do acclimate. They really do have a lot of awesome colors. :/
Sorry, it's all on you. if money is REALLY tight, I say rescue.
Over hundreds of bettas die in their small, dirty cups each day. Only you can help them live. Research and then save them, today!