Depends on the market..
Sub £50 is primarily button phones..
We needed a cheap phone for a history group that we run for people to call us on regarding local information, so a cheap £10 Samsung button phone and you can;t go wrong especially when all you want is calling and answerphone.
Getting back to clamshells, all the motorcycle couriers used to use them as there's no way to miss-dial on a clamshell when it's in your leather jacket pocket
