I've sold several of those. The cheapest I think went for $350 (pretty beat up condition), and the most expensive went for $1,300. A few in the $800 range. But condition is a big factor. In excellent condition, I'd say around $800 or a little more is the going price. Those are for boxes with normal careful wear anr tear, but no big scratches and damage. If it's really pristine, you can try to get more, but sometimes the only way to get more is to find two bidders who both really want it, (eBay).
Those boxes look really nice except the big mark on the top of the lower box. If that's permanent, I would try respraying that one area...bound to look better than a giant glitch. If you're going to sell it without dealing with that spot, probably about $500 is fair.