Ah. I don't think the name's really worth much, if anything at all. It's really easy to get a 'decent' two-word name - why pay millions for one when you could just hatch it yourself? I'd rather spend my tu on a rare, worthwhile name or one that means something to me.
I know I would definitely choose to spend seven million on a name like Fake rather than RagingWater. And I'm sure most others with enough tu to afford that would say the same thing.
But, yah. Your best bet would be just under 1.8 million, if you're willing to be patient for someone to come along and really, really need to buy. A little less than a million if you want a quick sale. I usually go with the latter when I can, since it gives you more of a guarantee the pet will sell before someone else comes along and undercuts you.