Sordid material, base, secured by bloke for next to nothing (4,5)
I believe the answer is:
dirt-cheap
'next to nothing' is the definition.
(I've seen this before)
'sordid material base secured by bloke' is the wordplay.
'sordid material' becomes 'dirt' (dirt can mean scandal or sordid information).
'base' becomes 'e' (Euler's number - base of natural logarithms).
'secured by' is an insertion indicator (inserted letters are held or secured).
'bloke' becomes 'chap' (both can mean a man).
'e' going inside 'chap' is 'cheap'.
'dirt'+'cheap'='DIRT-CHEAP'
'for' is the link.
(Other definitions for dirt-cheap that I've seen before include "Ridiculously inexpensive" , "Hid carpet, being unclean and inexpensive" , "Greatly reduced in price" , "Very low priced" , "Bought for peanuts?" .)