If you're looking for a pair of hair straighteners that don't cost the earth, then you can't go far wrong with these Toni and Guy Infusion Hair Straightener's.
As part of their Boxing Day Deals Week, Amazon are offering this straightener's for just £21.72 including delivery instead of the usual RRP of £79.99.
On Amazon these show up as £43.45, however below the price there is a drop down box which says 'voucher', if you click this box a 50% discount is automatically applied when you get through to the payment page. You should then be able to see the price change to just £21.72 including delivery.
These straightener's have pretty good reviews, they are ceramic and reach a top temperature of 230 degrees. This exact pair is currently retailing for £79.99 at Boots*.
The voucher is valid until the 31st December. I'd say these were definitely worth a go at this price!