Before putting any money down people really should do some research on the differences of one battery type to another. Often they get caught up in the manufacturer or brand name. Trojan has wetcell, AGM & gel cell batterys.
The specs of each type are different. Everyone wants cheap. Cheap does not always mean best value. At home I have a pair of group 31 gel cell batterys. They are 12 years old & still load test very strong. They cost more than double than a wet cell group 31 case size which would have been trash after 4 maybe 5 years.