Just been to tesco and i have picked up a high school musical dance mat, says reduced to £9.99 on self but it actually has yellow sale stickers on the bottom for £4.99.
I bought one for my daughter for her birthday.
Its still £26.39 in argos and £19.99 on tesco website, so a real bargin at £4.99
I picked this up in Tesco Quedgeley (Gloucester) and there was plently left on self. Hope this helps someone as its my first deal.