Has anyone successfully haggled with Dfs for a better price?

I have seen a sofa and matching chair I want to buy from them but the ' sale ' price is only £50 cheaper than the normal retail price. Has anyone successfully haggled with them or does anyone have any tips please? Also, is it easier to haggle if you pay outright or if you go for their free finance option. (I know some places want you to take the finance option) All help is much appreciated!