Inexpensive way to sell a lot? (9)
I believe the answer is:
knockdown
I believe this is a double definition.
'inexpensive' is the first definition.
(as in knockdown prices)
'way to sell a lot?' is the second definition.
(as in knocking down at an auction)
(Other definitions for knockdown that I've seen before include "very low" , "Cheap - floor" , "Fell" .)