Not sure how collectable this actually is, but the eyeball desk lamp by Prova Lighting is certainly an eye-catching and distinctive piece.
Designed in either the 1960s or (more likely), the 70s, this Italian design has an aluminium base and a steel body, with a lacquered mustard yellow finish. The entire thing stands at around 30cm and is, of course, adjustable.
This lamp has been recently re-wired, retaining its original period inline switch and is described as being in 'pretty much mint' condition. £4.99 is the current bidding price.