Mist of Pandaria Private Server of Firestorm. The realm of their MoP server is called Garrosh, and is running with 5X XP rates, and a PvE realm-type.

Shop: They offer Gear, Levels, Gold, Characters. It’s therefore a cashshop/pay-2-win system.

If you would like to play MoP, then the realm from Firestorm (Garrosh) could be a possibility.

You can join here:
https://firestorm-servers.com/