I'm grandmastered out. I was surprised to find the Ancient Spell Merchant ( LOL @the prices though) and I noticed that one spell seems to be broken. It shows up as red (non-purchasable) instead of white like all my other spells. Now this wont affect me since I highly doubt I'll ever have enough plat to purchase even one of the spells, but I'm sure some plat rich Paladin would like to have this fixed.
The image cannot be seen behind the work firewall here, but you probably have that spell grandmastered via character training choices, instead of a spellbook.
I'll check Yep it was my 95th level choice, Lay on Hands VII OK good to know they don't count. Not that I'll ever be able to buy one unless the price goes down.