The demand compared to supply ratio for the Z06 will far, far exceed trying to get a Z-51 last fall, and the market, for at least all of calendar year 2015 will result in most paying over sticker.
We do not know what Kerbeck will be charging, but keep hearing persistent rumors that they will announce over list. This is not fact, but purely rumor, and the only reason I being this up is that IF Kerbeck charges over list, then my belief is that most dealers will follow. There will be some exceptions, dealers who will charge MSRP regardless of what other dealers do, and there will additionally also be those individuals who already have an agreement to purchase with dealers at sticker. No inside info, but my opinion only, Kerbeck will announce their Z06 pricing and more (how they will accept orders, etc.) next Tuesday (when Z06 allocations are officially given to USA dealers by GM), and if not Tuesday, probably soon thereafter.
Had a very interesting, very recent conversation with another dealer who was one of the 900 "initial StingRay allocation pool", and who ordered and received Z-51's last fall. His name I will not share, but you know him if you watch Barett Jackson, and he is unable to get a Z06 even for his personal collection, nor for his dealership. He offered another equally well known, but HUGE Corvette dealer (top ten in Corvette sales) $25,000 over to buy a Z06 from that huge dealer and was told by this second dealer that all of his Z06's are already spoken for, "sorry."
This dealer marks the third dealer who has already shared, that while they were part of the initial 900 StingRay allocation pool last fall, that they know they will not be able to get a single 2015 Z06, raising our previous discussion of whether GM will lower that number of 2015 Z06 dealers to their top 500 only, to 300 or ???