I noticed this the other night on the DSE site under the clearance section for $50 then just now i noticed it has been further reduced to $20,seems like a good price if you're into that sought of thing.
In case some people don't know a scanner is a piece of equipment used to listen in on emergency services radio broadcasts,air traffic,marine etc.
MOD EDIT - Appears to be only left in WA stores and SA as per members posts below
Looks like out of stock around Melbourne. =/