Negotiating and Discussing Prices
If you are going to play in this pool, the best way to keep things safe and sane is to sit down and think about what the maximum amounts you are comfortable donating are. And stick to the maximum amount you settle on.
I don't like to discuss prices in messages and if an SB brings up prices or quotes prices at that point it is Not A Good Sign. Best to make some polite conversation, quickly switch to SMS or Snapchat and get a bit acquainted. Then arrange for a face to face meetup, usually over a meal. If they can't close the deal and make a meeting within a few days (a week at the most) then just move on. At such a meeting we might directly move on to more intimate activities, or at least discuss how we'd want those activities to go down and what fair compensation would be.
I think this works better because you aren't explicitly treating them like a Ho -- which always makes them happy at very little cost to you. And happier girls are generally much less expensive. Once they've met up with you they are also a little more invested and more likely to negotiate compensation with you in good faith. I've found that the ones asking really high prices are either using that as a graceful way to say, "No, not with you" or are just holding out until their Prince Charming shows up. Most of the ones who are asking high prices won't ever agree to a face to face meeting like this without compensation being set beforehand anyway.
That doesn't always work (really, nothing in this game always works) but on the average is the least bad way to go about it. For me.
And the more you treat 'em like a Ho the more they will treat you like a Customer.