Quilter,
I haven't received a quote but it's pretty easy to get a ballpark figure. The official Marriott Vacation Club resale website lists the resale price for 3 BR Grande Vista units as $12,600 for Platinum weeks and $9,500 for Gold weeks.
A bundle purchase requires you to buy a Trust Points package equivalent to the number of points your resale week would yield if you exchanged it for DC points. GregT's website indicates the point values for those weeks as 3725 points for Platinum and 2925 for gold. When we bought our bundle, the price for the week was not negotiable. You should be able to negotiate, to a small extent, the price and perks for the DC points. The going rate is $12.66/point, so at full retail you're looking at just under $60,000 for the platinum week bundle and around $46,500 for the gold week bundle. I think you would be able to negotiate the price per Trust point to something closer to $10.50/point.