The success of GlassNet suggests a swing in the working habits of many used buyers, the firm reckons.

Vik Barodia, director – dealer sector at Glass's, said: 'Ease of use and accuracy are critical factors driving this shift to web-based used car valuation, especially now that VRM-powered valuations are more readily available.

'GlassNet offers the simplest method for quickly generating an accurate and tailored valuation for a specific vehicle, and an ever-growing number of dealers are now adopting this new method for valuing cars.'

From April, a new version of GlassNet will be available. Called GlassNet Unlimited, this new version of the web-based solution enables dealers to value as many cars as they want without incurring any additional charge. For the typical user, GlassNet Unlimited works out at just over £1 per day.

GlassNet Unlimited features a VRM look-up facility, which the firm claims reduces errors in identifying the specification and age of a vehicle. Adjustments can be made for the vehicle's precise mileage, for items of additional optional equipment, and for light damage.

Customer Valuation Reports can also be printed off, detailing in full how each valuation was calculated, while Experian customers can also access the company's vehicle provenance checks.