Aldi will have these midi dehumidifiers instore from Friday 27/11/13 for £34.99 which seems pretty cheap.
Product Information :-
Helps keep rooms free from mildew and damp, so they stay dry, cosy and easy to keep clean.
Removes up to 400ml moisture per day
Tank capacity 1.5 litres with auto switch-off when full
Choose from: Pale Blue, Black or White
Weight of unit approx. 2.4kg
Cord length including plug: approx. 3.2m
Size: approx. 34 x 20.5 x 13cm