A mum has shared how she managed to score a lamb roast for a mere 83c from Aldi. Customer Monique was thrilled to pick up the half leg of Killarnee lamb for dinner and said it had been weighed incorrectly. The Australian meat usually costs $11.99 per kilo but had been weighed at only 68g and had a 'use by' date of June 3. Customer Monique was thrilled to pick up the half leg of Killarnee lamb for dinner and said it had been weighed incorrectly Best times to shop for markdown bargains Australian supermarkets are discounting items progressively through the day, with 20, 40, 60, 80 and even 99 per cent slashed off the retail prices.