Is it just my weak deal-finding skills or is Luigi's Mansion 2 really just impossible to find below £30? Actually, I'd probably settle for £30, considering it seems to be at least £35 in some places.
Luigi's Mansion 2
http://www.argos.co.uk/static/Product/partNumber/9128347.htm
Also Argo are doing a 2 for £55 on selected 3DS games. Offer ends 28 May 2013. Plus as a bonus you get £5 voucher to redeem against your next purchase.