Everything here is based on giving the best value point where price meets performance. This is my opinion. You can go cheaper but I think your experience will suffer and you can go more expensive but I think its not always worth it. Hope it helps some of you and you can use this information to make a better more informed decision.
EDIT. also for some reason the charger clip got deleted so thats included too in the totals
Spread sheet with prices -
I'm sure you can find cheaper if you look around. And don't forget shipping costs. Happy flying