As has been said, Ebay is one way to make money. I go to jumble sales, buy items for 20p and then sell them on for profit on Ebay (just sold a 20p pair of Levi's for £14).
I also go to the local sale rooms, buy at auction and sell things on. My best buy was a box containing 35 pairs of old ladies shoes (but good makes) I bought for £1 and made £497 profit!
Another easy one is to make money from writing tips/letters to magazines. I recently cribbed a "handy tip" from an old magazine in the dentists waiting room, re-worded it, sent it to a different magazine with a photo and was paid£40.
Are you any good at making things? One of my best moneyspinners is recycling old denim jeans. I make kids aprons, peg bags and patchwork tote bags from old jeans.
These are just a few easy ideas for making money from home. Good luck