hospitals who buyouts contact in cali?

Hi! I'm an agency nurse and I have a 3yr contract with them. I'm only receiving less pay than other nurses,only $20+/hr, and there's no night or weekend differential and I usally works at night or evenings and on weekends. My agency would send me toa afacility without any orientation at all. Does anybody knows a hospital that buysouts contract? Once they buyout your contract are you going to receive less hour rate than the regular nurses? Hope anybody here can help me... Thanks!