On the lower end, you can find refurbished legacy units starting from as little as £20.00, while a modern audio conferencing system (like a Teams-certified IP unit) usually sits between £300.00 and £800.00. Beyond the one-off hardware spend on conference phones, you should also factor in modest monthly platform subscriptions – often starting around £3.00 to £10.00 per user – depending on the level of voip conferencing integration your business requires.