Cant use tales of adventures

[SannaR]

I don't think the store is linked in anyway to be able to tell if you already have completed/used items from it, so it's not really a surprise it doesn't prevent purchasing something you can't use. It does have a large section right under the Buy buttons that has all conditions for it's use, so it's on the buyer to be sure they can actually use it.

They just recently will not allow you to buy orchestrion and mounts that you already own. It happened around the time they put in the gifting changes so it does have that capability in some form. Even still it is as you said it is on the buyer to make sure the item is being sent to the correct character if you have more than one. Or that you are buying something you can use on that character.