WotLK Error when purchasing an item

[Ramdeso]

It is not possible to buy the shoulders item for the paladin tank, it gives the error "You are not high enough to use this item." Please fix it.
https://www.youtube.com/watch?v=t0_NtphXruc

[Obnoxious]

Nothing to fix. You need the rating in real 3v3, not solo queue.