30 bags of Seabrooks crisps for £3 at Asda. Seemed good value as the 6 packs of these are £1 when they're on offer, and these work out to 10 packets for £1.
Really nice crisps-
Cheese & onion
Salt and vinegar
Sorry, can't remember exactly, but think it was 12 packs of ready salted and 9 of each of the others.