I would pay a grand for an amazing one off Batman but I won't buy anyone else
More or less, this.
Mostly because Batman himself is one of my favourite comic characters and I'd really want a modern take on the character. The Arkham Knight suit is perfect for the purpose.
Also, 1:3 is the biggest scale I'm willing to display and I think it's the perfect high end scale for a combo of sheer presence and awesome details.
So, for a one shot on the character, I'm all in.
Other issue is that, once Batman is done, I have no other character I would invest that kind of money on. I wouldn't spend 400$ for a PF on them, let alone a grand. Talking about the Bat villains of course.
Maybe an awesome Bane from Arkham Origins, I love him without silly add-ons like the Venom tank on his back.
Deathstroke is... decent. Overall I like the take they went for in Origins. It's just that if I stop and think about the character, I can't help but think he is tacky.