I took a chance on a cheap amazon 100 ah battery. Why? because I wanted to see how they held up. So far, a year of undercharging, over taxing, too cold and too hot it's doing great. I could have spent over $1000 for the same but with more features. Instead I spent $200 (ish).
I have stack's of individual cells kicking around because I like to build my own custom battery packs. For what the Amazon battery is, its actually a good price. If I built a comparable battery, the cost would be close to what I spent. For the battery nerds....I'm currently playing with 38120's and my next project is going to be with prismatics.
This is what I have learned so far. Compare features before you buy. I don't need Bluetooth, heaters, coolers. These features cost extra. When you compare, compare the same features.
Another thing you need to see it what type of battery they use. Not all Lifepo are the same. The one I bought cannot be used as a starting battery. It can be used as a moderate/ low draw camper battery. My power usage includes and older 50 qt fridge, a few lights, chargers and misc other low draw items (dont remember the numbers).
If you want a starter/winch battery, you need to step up and pay close to $1000. If you want it as a low to moderate draw camper battery, grab one on Amazon and dont complain if it only lasts 10 years.