Batch 6 was clocked at 600M.  The LN is clocked at 700M.

Either Bitmain has a typo on their freq. or their hash rate.

Even if it is the 600M boards, you could purchase 10 instead of 9 to achieve the same hash rate.  That is the math I used in the above post that puts the S7 at $366 new.  Still not seeing how you get to $400 or $425 being a fair price...

As for the warranty:

This warranty is valid only in the United States and Canada and grants specific legal rights, it does not extend to owners of the product other than the original owner. You may also have other rights which vary from state to state.

That's right from Bitmain.