You might apply a 'new car' / used car rationale: a new car costs what it does as it still comes with the full new car warranty. Obviously a used car (even with very low miles) lacks that, thus the price is lower as you aren't paying up front for the warranty, and depreciation has begun as well.
They may be thinking this Breedlove still comes with a warranty card, etc., so that's where they're at on it.
Up to you; if they have no intention of cutting their price a bit to finally move it, I'd keep shopping. I can tell you that probably nit-picking it to death probably won't advance your cause. I'd walk in with cash, low-ball them, be clear you're ready to buy right now for the right deal, and work 'em. If they just won't budge to your satisfaction, you have LOTS of other options.