This sale applies only to Farm Cash, with coin packages remaining at their original prices (then again, why would you buy coins when you can earn them for free anyway?). During this sale, you'll be able to pick up as little as 25 Farm Cash for $3.71 (down from $5.30), or as much as 650 Farm Cash for $74.20 (originally $106).
Luckily, if you happen to have a Zynga Game Card on hand, you can redeem this to also receive 30% more. In this way, you will still "pay" the same amount for the card in the first place, but you'll receive a bonus when redeeming, so long as you do so within the next 24 hours. For instance, if you happen to have a $25 Zynga Game Card from the Plush Ornament promotion at Best Buy, you'll now receive 208 Farm Cash, rather than the original total of 145 Farm Cash.
Note: If you do happen to need coins, this is the only way that you can earn bonus coins through this event, as you'll still have a choice between Farm Cash or coins when redeeming your card.
Again, this sale will only be available for the next day - until tomorrow night. If you need Farm Cash (or expect that you might within the next few weeks), don't hesitate to pick some up now. It's possible that we will see another sale before Christmas, but what if we don't? Keep that all in mind when going to make a purchase!
Will you buy Farm Cash / a Zynga Game Card during this 30% off sale? How much Farm Cash did you receive when redeeming your Game Card? Sound off in the comments.