1500 yards pretty consistently under most conditions. Up to 1800 yards under good conditions. These are hand held / steadied distances. I've never mounted mine on a tripod yet.
I bought one (a demo with full warranty) from Doug's Camera Land for ~ $750
See their demo page @ Demo & Sample Gear - Camera Land NY
Fast delivery & friendly service. Seemed like a competitive price. My demo unit looked like a new one, and again, came with the same warranty a new one would. Camera Land states that they are a Swarovski authorized dealer.
Hope this helps.