Finding Unique Values in a Range

I need helping finding the unique values in a range.

I'm using this formula to find the first value

{=INDEX(Y3:Y107,MATCH(TRUE,Z3:Z107>3,0))}

And this gives me the last value

{=INDEX(Y3:Y107,MATCH(TRUE,Z3:Z107>3,1))}

But the flaw in the logic is that it only gives me first and last. If the unique values are in the middle of the range, it doesn't give me the information I need. In this case, my data set has three different values. How can I find the three different values in the range?