Whatever you do, get a contract in place if you don't already have one. re: A. Under a standard contract in America, your client owns the whole thing. If tha

Whatever you do, get a contract in place if you don't already have one. re: A. Under a standard contract in America, your client owns the whole thing. If that's not the case, you need to specify where you are and probably speak to a local attorney. If the standard contract applies, your client can resell for any price he or she likes with or without your permission. re: b. Not wanting additional work at your previous pricepoint. This... doesn't make sense? You did fixed price work. So naturally any future work would either be bid or hourly, at which point you can quote any price or rate you like? What don't I understand here? re: c. I don't understand how you have any commercial interest in work your client pays for, or whatever your client does with that work after he or she pays you for it. If your client owns the thing, and resells it to another party, maybe you could offer to pool rates and charge each eg 1/2 your rate to build commonly requested features? To be honest, I'd personally hesitate to get in the middle of two businesses where each may have different acceptance criteria for features. It just sounds like potentially a mess, and I prefer to avoid messes in my life. Also, you should be unashamed to charge the rates you want. If the rates don't meet a potential client's requirements, that's their problem, as long as you are fully booked.