Most game stores that let you trade in will take a mint condition 3DS boxed for £60, so if you need a 3DS to play the new pokemon games or whatever it may be, but don't want to spend a bunch (since the "new 3ds" could be out in a couple of months).
Then buying this + alpha sapphire/omega ruby will only cost you £119.
When you register both of these (as long as it's before the 12th January 2015), then you get a free game worth around £25-£30.
So if you only need a console to see you through until the "new 3DS" comes out it seems good, you only end up losing about £30.
Don't bother getting if you can wait.