Just did a search and it looks like they sell for around $300 each, now this is only an opinion, but you can do a lot better in that price range.
Quite frankly any AKGs other than older 414's and the C-535 I would avoid. (Well ok C-12's rock).
In the $300 range, from personal experience I would recommend the Shure KSM-27 (very, very nice mic for the price), the Blue "Blue Bird" which is about as natural and open sounding as you can get in this range. The MXL V-6 is a very under-rated mic with a natural/vintage vibe to it.
There are also other choices from sE, MXL, Audio Technica and ADK (the Hamburg & Vienna) which are all better choices than the AKG C 3000 b