How much is a retro-computer worth?

There is money to be made from the rising fashion of collecting older technology as it goes out of production.

Last year, when they were still in production, an iPod Classic would retail at £229. Now they have been discontinued, they can sell as new for up to £670.

Old Spectrum computers from the 1980s and BBC Micros are among the machines being celebrated in new trend of so called retro-computing.

Philip Hampsheir reports.