Yup, the tractor-and-feed places apparently didn't get the memo the auto parts stores got about jacking up battery prices.
FWIW, about 15 years ago I had 2 new WalMart (Everstart ?) batteries that were junk: one wouldn't take a charge, and the other one leaked.
The 3rd one was fine, but because the guy in the auto service section told me "no more warranty replacement", I haven't bought one from them since.
I've had good experiences with pretty much every other brand; most go 10 years or longer, and I've replaced a couple at 11 years just from paranoia.