The 2013 Heritage card of Darwin Barney isn't a big deal. Flipping the card over is.
The card is the black back version, the Venezuelan version. They are a lot more rare than most people are aware. I've picked up as many Barney card as possible on Ebay. I typically pay just a buck or two for each. Seems like a bargain for something so scarce.
My unofficial watch shows that just 16 have been listed since 2013. I bought twelve of them. I also got one from COMC, giving me a total of 13. I'd love to find out the actual print run to see what percentage of them I've got.