Red Dot USA via eBay offers download cards for Far Cry 4 for PlayStation 4 for $26.49 with free shipping. That's $3 below our mention of a download from two weeks ago and the lowest total price we could find now by $14, outside of the mention below. (It's also $14 under our mention of a physical copy from three days ago.) Note: this is a physical card with the download code for your choice of Far Cry 4, Destiny, NBA 2K15, or Little Big Planet 3 which will be mailed after purchase.
A close price: TheGameRush26 via eBay offers it for $26.95 with free shipping.