Look around, I paid £39.99 for mine. It's adjustable as the one pictured is, solid and works fine. Gone up a bit, but not much.
www.ebay.co.uk/itm/ERGOLYNX-TURBO-TRAINER-CYCLE-FITNESS-EXERCISE-BIKE-MAGNETIC-RESISTANCE-TRAINING-/351176622025?var=&hash=item51c3c1ffc9