Just got back from looking at DVDs I wont buy at ASDA, and saw packs of 4 Sharpie marker pens at 87p each (yellow sticker, roll-back price). Not bad considering single black sharpies on the same shelf cost £1 each.
Plenty of colours (standard red, blue, green, black and more fun colours). Full size, not micro. Good deal for those who missed out on the Home Bargains deal or don't have one nearby.
Found in Wolstanton ASDA, but I'm well aware of how store-specific some deals can be (having travelled to and fro trying to find things before), so not sure if nationwide.
Phew, that was a lot of brackets (parentheses if you're a pedant).