£100 max, for an hour, £60 or £70, depending on the quality, for 30 minutes. In exceptional circumstances, £80 for 30 minutes
I've never had a problem getting sex in between relationships, so punting prossies merely gives me more flexibly, as to when and choice.
I also don't think any prossie is worth more, when there are plenty of options around for my needs, at my price. But understand that's just my point of view!