I was told this is very rare, and it's in stock so I guess buy it!
(From last thread on it):
"A very difficult to find title and especially at this price. Play.com had it for 17.99 only two weeks but I missed it since it sold out very quickly but now it's back in stock again. This is usually sold on eBay for around 30+ pounds (last time I checked) and the nearest online shop price seems to be 39.99 at Soft.co.uk so make sure you buy it while you can."