Cheapness is in the eye of the beholder.
Actually, you can find these shelving units often scrapped in junkyards.
The punched grey stuff, w/ sheet metal shelves, about 12 or 18" by 36", are
at least $80 a "unit", new--a few years ago here in Brooklyn, NY.
Scrapped, they ought to be near-pennies.

Also, apropos of JR Carroll's usual perspicacity, you don't need punched
angle iron either, iffin yer willing to drill the attaching holes yerself in
regular angle iron, also available in scrap yards--and from all those bed
frames you see thrown out in yer local ghetto. With wheels!
Must from the regular evictions'n'****.
--
Mr. P.V.'d
formerly Droll Troll
wrote in message
...
"Proctologically Violated©®"
wrote:

Except those shelving units are not nec. cheap.

Really?

I've seen light weight metal shelving not that
expensive