Id like them to do this:  Charge $249 with a launch game of my CHOICE.  I would definitely dig this one.  

Without game $229.

$300

$250, I wonder how much games will cost.

If this comes out at £150, I will probably get one.

A lot of factors come into this for me like how good the 3D is and how much the games are since if each game is like $50 it would be a no from the start. If I assume the 3D will be great and the games cost the same as a D.S game then I would pay at most about...

$220.

Anything under $200.01

I won't ever pay more than 100€ (~$120, VAT included) for any portable. This applies also to 3DS.

I'd trade my wife, dog, kid, and entire collection of Gramma's knitted mittens for a 3DS and i really like those mittens.

200$ max.