Just browsing the shelves and noticed they'd done a price cut on the Tomy Babylink Monitors - great price i thought for a cheap replacement of your normal monitor, or maybe to keep at granny's even!
Showing up full price on-line, but deffo £7 (as shown in pic in first post)
Next cheapest I found is in Argos for £10.99
This is the most basic model:
Baby Link: Product Details taken from (( http://www.tomy.co.uk/products/baby-link/
Easy-to-use, basic nursery audio baby monitor ideal for single circuit flats or houses.
Simply plug the baby unit in the nursery and the parent unit where you are and they transmit via the home wiring.
Plugs into any 13 amp socket around the home.
Volume control on the parents Baby Link unit has a pre-set minimum to ensure it is never accidentally turned down too low.