for other ideas on the glyph market please follow the link to the free Croda's Inscription Gold Guide
I am selling more of these recently.
Perhaps hunters are coming back before Mists of Pandaria to level up and at the same time choosing to change their pets name?
The Certificate of Ownership can only be crafted by a Scribe. It is the only thing that a Hunter can use to change their pet's name - it does not drop from a mob nor can it be bought from a vendor. Scribes therefore are the sole supplier.
Furthermore, few Scribes bother to post these - making the supply very low.
If a Hunter wants to change the name of their pet, they are unlikely to be put off by the price of this scroll. Therefore, the sales price need have no relevance to the cost price. The sales price merely need not be off putting.
To craft it costs 2 celestial inks plus 1 common parchment. On my server that is c10 gold per certificate. The 48 hour deposit fee at the Auction House is 15 silver.
I sell them for a maximum of 100 gold and a minimum of 20 gold. So my profits per certificate sold is 10 to 90 gold. I post 5 at a time in singles.