One of the things that appeals to me about the UK's and Canada's systems is that they seem to be relatively uniform. That is not true in the US - insurance fees, additional payments, prescription charges and so forth are all over the place (for example, I pay much less than Lonesome EJ's example for prescriptions - generally $3 for a 90-day supply). I'm curious how it works for those who choose to go into some kind of self-pay mode; do they pay for additional or faster services on top of what NHS covers, or once they opt out, are they entirely on their own?