Go to Glassboro and a couple of doors from the Police station is Rips Auto Store (not sure of the name) and they handle DELCO Voyager batteries. They are in that price range and will last at least 3 long TM seasons if you recharge them soon after a fishing day.
I have a big marine deep cycle that I bought in 2010. I used it once and then my dad sold our little boat. It's been in his basement. He is having a yardsale tomorrow and I told him to sell it. I paid over $100 for it. If you want it shoot me a text at 6099221650 and I will tell him to sell it to you for $10. Text me with your name and I will text you his address and tell him to set it aside.