my sister and her fiance:about £20 on each other, maybe a bit more depending on the present. me and my sister also buy each other a pair of pyjamas for christmas eve, which are usually around the £5-10 mark.
mum, dad, step-mum and step-dad: about £20 each or more if we are buying between us (dad and step-mum would actually go mad at us if we bought them an expensive gift as they know we dont have a lot of money, so as long as its something they will like and we put thought into it they are happy).
grandma and grandad: is usually about £10 as they never want much and usually ask for some nice biscuits or shower stuff, again they would kill us if we spent a lot on them.
2 nephews: about £10 for each of them, depending on what they want and the same again for the older ones birthday on new years eve.
niece (who was born about 3 hours ago actually): spent about £6 on a pink elephant for her
friends: i only buy a couple of my really close friends who mean a lot to me, the rest we just get together and have a damn good night to celebrate christmas, which everyone is happy with that as its too expensive otherwise (especially as a lot also have kids so christmas is expensive enough without having to pay for all our friends presents as well, a card and a few drinks together is good enough)
the rest of the family my mum pays for. we have a lot of cousins, aunts and uncles and its always been that mum buys them something from me and my sister, mainly due to us never having much money. these are just rough price ranges and as long as its something they will like or that they ask for it doesnt really matter to anyone how much it costs.