The Black and Decker HP188F3B is a heavy duty DIY cordless hammer drill/driver that normally retails for around £100. It is 18V, has 42Nm of torque, has two battery packs, and comes in a decent carry case. With a little effort you can get it for just £50.99 (i.e. almost half price) from B&Q provided you're quick! Here's how....
1) At the moment Argos have this on offer for £66.65. It is £99.99 at B&Q, so go to Customer Service and tell them this. Their price promise means they will not just match the Argos price but also beat it by 10% (note this is not 10% of the difference - they will match a competitor price and then take 10% off that price). This takes the price down to £59.99 (£66.65 - £6.66).
2) Give them the current 15% off voucher which expires tomorrow night (see linked vouchers for an image to print out). This takes the price down to £50.99 (£59.99 - £9.00).
I did this earlier today and was surprised with the ease with which this was all possible; i.e. they accepted the 15% off voucher without any quibble. The voucher itself lists certain exclusions, but price matching is NOT listed as an exclusion.
IN EFFECT IT MEANS THAT YOU CAN GET B&Q TO SELL YOU SOMETHING 23.5% LOWER THAN A CHEAPER LOCAL COMPETITOR.