Retailer Dick Smith's website is back online after being hit by an apparent glitch this morning that let shoppers "purchase" all products, including expensive plasma televisions and smartphones, for free.

The glitch let one person purchase a 46-inch plasma Panasonic TV - worth more than $3000 - for free, charging only a $52.50 delivery fee.

The site was taken offline for maintenance but was back by 3.30pm

Members of online technology site Geekzone have been reporting problems with the site for a few weeks, and some were quick to take advantage of this morning's fault.

One member posted: "I have successfully submitted an order for a 40" TV and an iPhone, all for the sum of $4.95 delivery which went through on my credit card."

Dick Smith has issued a tweet, saying it will be in contact with people who have placed orders "to confirm cancellation or whether you would like the items at their correct pricing".