Character purchase

Greetings,

I would like to know before purchasing a character on the market, are we allowed to ask a GM to check their quest status for attunements?
For example the seller description goes as following: T5 attuned and some quests for T6.

Can I request a GM to check the characters status of:
Trial of the Naaru: Magtheridon
The Cudgel of Kar'desh
The Vials of Eternity

Asking only as some descriptions have no contact information and the site only shows karazhan attunement.

kind regards,
Nzzoth