Not as high as $600 for just a battery!!!
http://www.maxamps.com/Lipo-10000-222-Pack.htm

I can't imagine they have ever sold one but who knows.

As for your earlier post about my comment. If you had read what I said, I mentioned used stuff can be had much cheaper but all new and all name brand $800 is not enough. I also said that I run Zippy lipos. Those are "cheap"

Out of the 100+ vehicles I have owned 3 have been bought brand new. Summit, Slash, and Slayer. That's it. I always buy used because I let someone else take the hit on depreciation and I don't mind putting in the wrench time to get the vehicle where it should be.

As for Caster. I don't doubt they are great cars since so many people like them. However, not a person in this state (may be exaggerating) runs one and there isn't a shop along the I-5 corridor anywhere that carries parts for them that I am aware of.