What’s the best art you can buy for £500? “My first port of call is that of any lazy bargain hunter – eBay. At the rock bottom end of the price list are an awful lot of paintings of dogs and tulips. Indeed, should I so wish, my budget could get me 50 portraits of golden Labradors; but I suspect my walls would then be petrifying, rather than powerful. At the £500 mark, there are more exotic animals; a family of elephants drinking by a lake; a tiger with a soul-piercing gaze.”