If you want one with a different pigment to it, I would have to say a pastel. The 1 I just picked up was about $200 I think with delivery.
I have seen them for about $150.00 on some sites though. A normal, depending on the sex (Females are more expensive) can be between $50-$100. Some people will give you deals on them as well if you buy others.
This is him:
And this is my normal:
They are a little more pricey around where I am because we don't have as many breeders as they do in the states or the UK.
I think that aquarium could work if you can clutter it good.
But I'm not a professional either.