[sql] NPC sell prices audit

[sruon]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Updates the NPC sell price of 2132 items. Port Jeuno Challoux as source of truth.
@montijin gets all credits for organizing the effort.
I spent close to 200M myself auto-buying stuff off AH as well.

My capture DBs

Steps to test these changes

Some stuff gets nerfed, some stuff gets buffed.