If you are familiar with Keen shoes, you'll know they're excellent quality and not cheap. These are their casual sneakers (think Converse All-Stars, but chunkier and a little more wholesome!) which are immensely comfortable and last really well.
Short of buying in the US, this is the best price I've found for these.
Delivery is £4.95 but the current 15% off code (S9jRAo) takes £3.75 off. A few others are listed at £29.99.