If you like Villas (larger than studio rooms) then VGC is a great value even at 250+. If room rates continue to spike at the Grand Cal, I could see it supporting a value well north of 300 and even into the 400 range with enough time/inflation. At some point it will hit the "there is only X years left" contract danger zone, but that is a long time from now.
DVC has many magical and iconic resorts and VGC for many is a magical unicorn. It's great when you are sitting on the bus back to a WDW DVC resort and chatting with other members when the "where do you own" conversation comes up. When I mention Grand Cal, 99% of the time their eyes light up and the expression on their face is priceless