A shortage of Guitar Hero World Tour’s full band kit for all platforms is driving resale demand to above the $300 mark in North America.

Analysts at Cowen and Company downplayed concerns over the latest instalment of the Guitar Hero’s sales, labelling them "overblown", but the group did say that the poor supply was being exploited by resellers selling the full kit at a cost many times higher than the retail price.

"In order to assess continued demand for the title, we conducted proprietary channel checks both at major online retailers and at bricks-and-mortar retail locations across the country," the company explained, adding: "resellers on Amazon.com are pricing the band kit at close to $300, well above the $189 list price."

At the time of writing, used versions of both the Wii and Xbox 360 versions of the game were being sold on Amazon.com for $350, while the PlayStation 3 version was going for as high as $325.