433MHz modules

For a long time, I have been of the view that readily available 433MHz ISM modules which are licence free at 10mW could be used at the heart of amateur transceivers.

I see you can buy 2 from Amazon UK for £11.99.  Probably you can buy these for less with a bit of hunting. 

Normally, these are digital transceivers, but I am sure those with any brains would be able convert them to other modes. 

If I was fit again I would have a go myself. Sadly I am not.