Yes, I have noticed that some of the *GT prices have changed, an example:
Both prices based on 2 adults 2 children.
Dream - April 11, 2013 Bahamas - 3 Night
VGT $2,060.88 Price on Wednesday, March 06, 2013 35 Days prior to sale
Dream April 11, 2013 Bahamas - 3 Night
VGT $2,330.88 Price on Friday, March 22, 2013 19 Days prior to sale