1. There are five sits pins: strawberry, pineapple, orange, lime and cherry. And there is one hat - the Fruit Hat
2. From what I got so far, I believe the strawberry, pineapple and orange are commons, lime is rare and cherry pin/fruit hat are ultra rares (please correct me, anyone, if I'm wrong!)
3. Not sure of the values yet as they are quite new, but if the lime is rare you can probably sell them for a couple thousand credits
hope this helps!