Everyone loves brand-new appliances, so if your home boasts an old heating system, an outdated washing machine or a grimy refrigerator, you could inadvertently be putting potential buyers off. Invest in high-quality, energy-efficient appliances and you could boost the interest in, and value of, your home. However, be wary of splashing out unnecessarily on pieces that don't hold their value and keep your expenditure in line with the house itself – designer white goods will always help sell a mansion but you may not recover your costs on a three-bedroom family home...