It really depends on if you can get a satisfactory answer for "why" it has been sitting that long (and an understanding that, the car has almost 2 years of depreciation on it already too, so that 6k discount isnt "really" a 6k discount. it may not even be discounted enough for what its worth due to depreciation).
I certainly wouldnt buy it, but I have very little tolerance (or high skepticism, depending on how you look at it) for a "new" car that had been sitting around for 2 years. Some see a deal, I see "WTF bbq?!?!?" (lol).
that being said, some people really like deals like these. If thats you, and you get a good answer for why it was sitting around (and maybe some other goodies thrown in like free supercharging for a year or something if that has value to you)... maybe?