Last night at Christie's auction house in New York, Picasso's Women Of Algiers, which the artist painted in 1954, sold for $179.3m (£115m). Of course, the most pressing question here is: when you have that much money to spend, does the .3m on the end just feel like small change? Aside from that, we also wondered, how can you decorate your walls when your budget is more like £17 than $170m? Here are four very good ways.