Well, I can only speculate on price of course but I'm pretty sure BOTH battleforces that the
IG offer come CLOSE to 500 points just like the necrons. I think that's what all of the battleforces are meant to give.
I personally can not STAND the
IG but I have a friend who loves their fluff but if I'm being honest the necrons are by far my favorite of the two. They have a few units that are SCAREY in
CC so I wouldn't count them out
I know the
IG have a few nicknames my favorite being the "parking lot" army. You hit the field setup and shoot until you can't shoot anymore (giggity)
Fluffwise it's just like a combo of our army navy air force and marines.
Whereas the necrons are zombie robots from the past here to harvest whatever they feel to be "inferior" which is EVERYTHING
lol so it's all about whihc models you like more man I love the necrons I love the zombie robot Egyptian feel vs a bunch of random guys that are forced into combat against things they shouldn't KNOW about let alone be fighting =) (I'm a huge space marine fan
btw so it's not all hate on the imperium XD)