There’s now a unofficial PC add-on called Nirn Auction House that provides a central auction house!
Nirn Auction House allows you to trade with anyone across all of Nirn with no listing fees or tax.
When using NAH you simply pay the ESO postage fee when you mail a sold item.
NAH is a global auction system, unlike the guild store you will be able to list, watch, view, bid for items and buyout items.
There’s also an Option to get notified by email when you sell an item.
Download the add-on: Nirn Auction House