I ran across somebody selling a few Optima Blue top batteries. Spiral cell AGM type. They are the bigger Group 31 size, and are the dual purpose type: they work both for starting and deep cycle. He is asking $150 a pop, and they typically run over $300 each. Manufacture date was about May 2014 on the one he send me a pic on. I am leaning towards offering him $75 to $100 each for 2- he has 4 total. Should I pursue this ? I usually use Group 27 batts, but I found that the Group 31 which is slightly bigger will also fit, and only weigh 3 lbs more than the group 27.
Here is the exact item at Amazon: https://www.amazon.com/Optima-Batteries-...ima+blue+top+31
I like Optima batteries: I have never had one last less than 10 years.