I would prefer the size 8 and ivory over light gold, but I found a size 10 in white for $500... and it seems a small sacrifice to make for such a price.
If you'd worn yours, I'd offer $650, but I can't logically make that offer on an unworn Phillipa. It would just be crazy!
Not that I prefer worn... I just prefer not to spend more than my original dress cost.
(Found a pic of my future mother-in-law in a dress that looked too much like a dress that I'd bought... now I can't stand my dress! And thusly scrambling to find a second dress.)