Please include as much of the following information as possible to help me fix the bug:

Are you on the retail or the classic version of WoW? Retail

Is this a bug or a feature request? Feature

Bug:

Brief Description of Bug

Please include a brief description of the bug, including what you were doing, and when it occurred.

Steps to Reproduce

Include the steps I would need to follow to reproduce the bug.

Loaded Addons

Include a list of addons you were running at the time this bug occurred.

Back Trace (LUA Error Output)

You can get this through the use of !BugGrabber and BugSack addons.

Feature Request:

Is your feature request related to a problem? Please describe

Describe the problem you are experiencing. No problem just nice to have.

Describe the solution you'd like

Ability to filter by expansion in buying tab.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered. None

Additional context

Add any other context or screenshots about the feature request here.

Auctionator doesn't edit the "Buying" tab, so the option won't be added to that. This issue is similar to #1293 - which refers to the Shopping tab, which is managed by Auctionator, any updates to include an expansion filter will be tracked there.