if you decide to use natural window light, put something in between the window and the item your taking - a net curtain or a thin white material.
Natural light, especially sunlight can glare of the item your taking pics of - so you may need to "dull" the light down abit.
Ã'£39.99 page 1185 argos catalogue 2.95 kg's that's the lightest
BUT
page 1184 there is one at Ã'£14.99 but thats not so light at 3.26 kg's
hope that helps