There are definitely deals out there. I've managed to buy 4 new genuine DJI OEM batteries on eBay during the past year, priced anywhere from $75 - $85, including shipping. I just keep searching until I find best price. BE WARNED, during that time I've found a lot of deceptive sellers trying to pass off aftermarket batteries as genuine DJI brand. I've seen a lot of eBay sellers intentionally describe Phantom 3 batteries as DJI brand, but then auction photos show aftermarket batteries. I even saw one seller go so far as to include one single photo of a genuine DJI battery along with all the other photos of his aftermarket batteries in an attempt to make buyers think they're getting a DJI battery at a bargain price. These weren't simple mistakes. They were intentionally misleading auction selling techniques. The item description can be, and often is, misleading. Look at the auction photos and then look at your own DJI battery for comparison. There are some key things to look for that can tell you if it's DJI. If the price is too good to be true, it's probably not a DJI battery.