Cheap items almost free in black taxi drivers' association (4-1-4)
I believe the answer is:
bric-a-brac
But I can't explain it at all! Could you help me understand?
(Other definitions for bric-a-brac that I've seen before include "Miscellaneous small objects, especially curios" , "Motley collection" , "Miscellaneous small ornaments" , "Odd items of furniture, ornaments etc" , "Knick-knacks" .)