I charge £20 extra, is that too little?
I think it depends on what you want to make. I charge extra for A, £50 (reduced to £30 if the book my top tier session), £20 WS, Filming, £40 and now £20 for Facial.
Basically, my top price with A is £180 and other extras would take it over that figure, but if they book my lower rate session and wanted a Facial that would be £150. I'm happy with these figures, so it all depends on a) what you want to make and, b) what they're prepared to pay.
I would rather have an extra client than be sitting waiting for the phone to ring but that's because I've got no patience