First of all, this glyph must be made with inscriptions, and the finished product can be traded.

The professional drawings dropped by monsters all require you to learn the corresponding business skills. Only you can get it,

This has nothing to do with your profession of learning inscriptions. All business skills after 8.0 are graded by region.

Then your inscribed trumpet must have at least the professional skills of Legion or above.

Then use this number to brush the glyph drawings.

The blueprints are not guaranteed to drop, and the drop rate is not high. Otherwise, AH wouldn’t have been on the shelves long ago. But that doesn't mean it won't fall.

I think back in 7.1, I got a Glyph of a Doe, and I was the only one selling the entire AH. For 5K a copy, there were actually big bucks buying it.

Rare things are more valuable. If rare goods are available, they will definitely be sold very expensively. If you don’t want to be cheated, you can only buy them yourself.