Falling prices in September for plasma televisions and digital cameras sparked the biggest monthly decline in US consumer electronics prices in five months, according to NPD Consumer Electronics Price Watch. A decline of 9.2% (or about $250) in prices of 42-inch plasma screen TVs brought the sets’ average price to below $2,500 for the first time and led an overall decline of 2.7% for the most popular consumer electronics goods. The price for a market basket of the 27 most popular electronics goods fell to $11 642 in September.