Its a crap shoot no matter who you buy a battery from or who's name is on it today,in my opinion..
There are maybe three major manufacturers in the USA and they make practically all the batteries sold by all the retailers...Exide,Johnson Control,and Interstate..
I have been keeping an eye out for a sale on batteries,but none of the stores around here have any real "deals"...so far the lowest priced "large" battery my diesel needs I have seen is an Exide group 31 ,from Tractor Supply,priced at 100 bucks...it might require some battery tray mods,but it would be worth it...over 1000 CCA and almost 2 hour reserve capacity..
Seeing most other stores want more than that for a smaller battery,I think that isn't that outrageous,but I can remember seeing the same batteries there a few years ago for 60 bucks...the prices have doubled and tripled lately on batteries..
I've been running salvage yard take outs for 30 bucks exchanged in past years with no issues,I just pick the newest ones and hope for the best..