Blizzcon Sales in the past ?

[Fragile]

Hey

I just wanted to know if anybody is remembering any kind of sales on services like realm- and race changes for WoW during a Blizzcon in the last few years.

I'd love to do a few realm transfers right now and change a few races but I'm not sure if I'll regret it in a few days, when some kind of sales were to be expected.

Have there been any during Blizzcon 2018 , on black friday or in the time leading up to christmas? I really can't remember :/

Thanks in advance for answering