Tired chap worried for nothing really (4,5)
I believe the answer is:
dirt cheap
'for nothing really' is the definition.
(sold for almost nothing)
'tired chap worried' is the wordplay.
'worried' is an anagram indicator.
'tired'+'chap'='tiredchap'
'tiredchap' anagrammed gives 'DIRT-CHEAP'.
(Other definitions for dirt cheap that I've seen before include "Greatly reduced in price" , "doing little damage?" , "rock-bottom prices" , "next to nothing" , "Ridiculously inexpensive" .)