Whatever happens, never mind the price (2,3,4)
I believe the answer is:
at any rate
This clue is a double definition.
'whatever happens' is the first definition.
('at any rate' means whatever the outcome)
'never mind the price' is the second definition.
(at whatever price or rate)
(Other definitions for at any rate that I've seen before include "Whatever may happen" , "come what may" , "regardless of the cost?" , "regardless of the speed" , "Price thus unspecified" .)