From EU forum post by their community manager.
Quote
I inform you that the price you pay to sell ammunition in 8.4 will be 85 credits.
Greetings
Double confirmed post.
Ectar, on Mar 05 2013 - 18:28, said:
A - A stockpile of shells.
B - Your money back.
For shells purchased in 8.3, they sell back for the same value in 8.4,
for shells purchased in 8.4, they sell back for their increased value in 8.4
Buying a ton of shells now does nothing for you except fill your depot with lots of HE shells for the 20 pounder. Sorry folks, the Developers were on to this. The spike in purchases especially today was kinda huge.
Be aware that so far two community managers confirmed this for the EU server. NA server could be in too.
EU CM confirmed the changes for NA server too. Post
Quote
LE:Apparently RU server got to profit from selling the shells at 130cr!
There is no such thing as russian bias lol!

Aftermath :
Russians got away with it
GeneralDirection, on Mar 05 2013 - 22:58, said:
We understand the concern, but unfortunately we cannot make a statement on what might happen to those that were able to take advantage of this, as it is against our policy to publicly discuss account sanctions.
No one noticed anything strange going down on RU server
GeneralDirection, on Mar 05 2013 - 23:08, said:
I'm sorry you're upset by this, but we're not going to allow an additional 2.5 billion credits to enter the game economy because of this.
Wats the deal WG?
GeneralDirection, on Mar 05 2013 - 23:23, said:
Stats went crazy only for NA EU
GeneralDirection, on Mar 05 2013 - 23:32, said:
How many shells stockpiled?
GeneralDirection, on Mar 05 2013 - 23:54, said:








