Help me!

I have a few sterling items I have no idea of how to price or who made them. Please help me.
1st-SS earrings marked on back - TO-75 Mexico 925
2nd-earrings marked on back - Sterling Skffts
3rd-Mask earrings - ROCK ART MASK sterling with oval trademark of crescent moon and bear-how much are these worth?
4th-solid(heavy) ornate decorated sterling cuff (with center space for large oval stone). stamped ADC sterling - how much is this worth without center stone?
thank you very much!

Hello, We would need to see images, impossible for us to go from these descriptions.